The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A333847

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Showing entries 1-10 | older changes

A333847

a(n) = A063514(A028982(n)).
(history; published version)

#11 by Susanna Cuyler at Mon Jul 19 01:22:05 EDT 2021

STATUS

proposed

approved

#10 by Jon E. Schoenfield at Sun Jul 18 18:44:57 EDT 2021

STATUS

editing

proposed

#9 by Jon E. Schoenfield at Sun Jul 18 18:44:56 EDT 2021

COMMENTS

Except for the 2 first 2 terms, all terms are odd.

STATUS

approved

editing

#8 by Alois P. Heinz at Wed Apr 08 12:11:01 EDT 2020

STATUS

proposed

approved

#7 by Michel Marcus at Wed Apr 08 12:05:46 EDT 2020

STATUS

editing

proposed

#6 by Michel Marcus at Wed Apr 08 12:04:23 EDT 2020

LINKS

Michel Marcus, <a href="/A333847/b333847.txt">Table of n, a(n) for n = 1..5000</a>

STATUS

approved

editing

#5 by Bruno Berselli at Wed Apr 08 11:56:12 EDT 2020

STATUS

reviewed

approved

#4 by Joerg Arndt at Wed Apr 08 03:38:08 EDT 2020

STATUS

proposed

reviewed

#3 by Michel Marcus at Wed Apr 08 02:14:20 EDT 2020

STATUS

editing

proposed

#2 by Michel Marcus at Wed Apr 08 02:14:13 EDT 2020

NAME

allocated for Michel Marcus

a(n) = A063514(A028982(n)).

DATA

0, 0, 1, 3, 1, 7, 3, 11, 15, 7, 15, 13, 31, 3, 13, 3, 17, 23, 63, 19, 39, 27, 63, 65, 43, 69, 127, 51, 35, 91, 81, 39, 15, 1, 237, 9, 51, 255, 47, 115, 105, 281, 87, 33, 117, 121, 87, 33, 59, 207, 181, 63, 235, 511, 141, 409, 243, 517, 87, 343, 295, 249, 75, 615, 363

OFFSET

1,4

COMMENTS

Except for the 2 first terms, all terms are odd.

PROG

(PARI) lista(nn) = {for (n=1, nn, if (issquare(n) || (!(n%2) && issquare(n/2)), print1(sigma(n) % eulerphi(n), ", "); ); ); }

CROSSREFS

Cf. A028982 (squares and twice squares), A063514 (sigma(n) mod phi(n)), A072808.

KEYWORD

allocated

nonn

AUTHOR

Michel Marcus, Apr 08 2020

STATUS

approved

editing