The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A257263

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

A257263

Numbers such that the least missing nonzero digit (A257079) in their factorial base representation is 3.
(history; published version)

#13 by Joerg Arndt at Wed Feb 14 01:05:29 EST 2024

STATUS

reviewed

approved

#12 by Michel Marcus at Wed Feb 14 00:29:16 EST 2024

STATUS

proposed

reviewed

#11 by Amiram Eldar at Wed Feb 14 00:15:29 EST 2024

STATUS

editing

proposed

#10 by Amiram Eldar at Wed Feb 14 00:06:07 EST 2024

LINKS

<a href="/index/Fa#facbase">Index entries for sequences related to factorial base representation</a>.

MATHEMATICA

q[n_] := Module[{k = n, m = 2, r, s = {}}, While[{k, r} = QuotientRemainder[k, m]; k != 0|| r != 0, AppendTo[s, r]; m++]; SubsetQ[s, {1, 2}] && !MemberQ[s, 3]]; Select[Range[220], q] (* Amiram Eldar, Feb 14 2024 *)

STATUS

approved

editing

#9 by N. J. A. Sloane at Thu Apr 30 21:46:04 EDT 2015

STATUS

proposed

approved

#8 by Antti Karttunen at Mon Apr 27 17:58:17 EDT 2015

STATUS

editing

proposed

#7 by Antti Karttunen at Mon Apr 27 17:58:09 EDT 2015

NAME

Numbers such that the least missing nonzero digit (A257079) in their factorial base representation is three3.

#6 by Antti Karttunen at Mon Apr 27 17:21:05 EDT 2015

CROSSREFS

Subsequence of A256450.

STATUS

proposed

editing

#5 by Antti Karttunen at Mon Apr 27 15:02:47 EDT 2015

STATUS

editing

proposed

#4 by Antti Karttunen at Mon Apr 27 13:01:28 EDT 2015

EXAMPLE

The factorial base representation (A007623) of 5 is "21", the least nonzero digit missing is 3, thus 5 is included.

The f.b.r. of 10 is "120", and likewise, 3 is the least missing digit, thus 10 is included.

The f.b.r. of 101 is "4021", where the least missing digit is 3, thus 101 is included in the sequence.