The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A071201

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A071201

Array A(n,k) read by antidiagonals giving number of paths up and right from (0,0) to (n,k) where x/y<=n/k.
(history; published version)

#36 by Alois P. Heinz at Thu Jan 18 17:40:50 EST 2018

STATUS

editing

approved

#35 by Alois P. Heinz at Thu Jan 18 17:40:48 EST 2018

FORMULA

Sum_{k=1..n-1} A(n-k,k) = A298072(n)-2 = for n>0. - Lee A. Newberg, Jan 18 2018

STATUS

approved

editing

#34 by Alois P. Heinz at Thu Jan 18 17:15:40 EST 2018

STATUS

editing

approved

#33 by Alois P. Heinz at Thu Jan 18 17:13:37 EST 2018

FORMULA

Sum_{k=1..n-1} A(n-k,k) = A298072(n)-2 = for n>0. - Lee A. Newberg, Jan 18 2018

CROSSREFS

Cf. A260419, A298072.

A298072(n) = 2 + sum of elements of (n-1)-th antidiagonal of this array. - Lee A. Newberg, Jan 18 2018

STATUS

proposed

editing

#32 by Lee A. Newberg at Thu Jan 18 11:35:09 EST 2018

STATUS

editing

proposed

Discussion

Thu Jan 18

12:02

Michel Marcus: I don't think this crossref is necessary : it was already been said in A298072; moreover it is much tooo early since A298072 has not been approved yet

12:13

Lee A. Newberg: Shouldn't crossrefs point both ways?

13:14

Michel Marcus: Not necessarily (there is the refs that give all sequences that point to a given sequence; click inpublished version, then refs to see what it gives now)

#31 by Lee A. Newberg at Thu Jan 18 11:34:23 EST 2018

CROSSREFS

Sum A298072(n) = 2 + sum of elements of each (n-1)-th antidiagonal given by A298072(n)-2of this array. - Lee A. Newberg, Jan 18 2018

STATUS

proposed

editing

#30 by Michel Marcus at Thu Jan 18 10:47:02 EST 2018

STATUS

editing

proposed

#29 by Michel Marcus at Thu Jan 18 10:46:53 EST 2018

CROSSREFS

Sum of each antidiagonal given by A298072(n)-2 . - Lee A. Newberg, Jan 18 2018

STATUS

proposed

editing

Discussion

Thu Jan 18

10:47

Michel Marcus: punctuation ...

#28 by Lee A. Newberg at Thu Jan 18 09:53:41 EST 2018

STATUS

editing

proposed

#27 by Lee A. Newberg at Thu Jan 18 09:52:57 EST 2018

CROSSREFS

Sum of each antidiagonal given by A298072(n)-2 - _Lee A. Newberg, _, Jan 18 2018.