The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A359196

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

A359196

a(n) is the number of subsets of the divisors of n which sum to n+1.
(history; published version)

#32 by OEIS Server at Mon Jan 20 22:52:31 EST 2025

LINKS

Antti Karttunen, <a href="/A359196/b359196_1.txt">Table of n, a(n) for n = 1..65537</a>

#31 by N. J. A. Sloane at Mon Jan 20 22:52:31 EST 2025

STATUS

proposed

approved

Discussion

Mon Jan 20

22:52

OEIS Server: Installed first b-file as b359196.txt.

#30 by Antti Karttunen at Mon Jan 20 16:41:08 EST 2025

STATUS

editing

proposed

#29 by Antti Karttunen at Mon Jan 20 16:40:53 EST 2025

COMMENTS

Question: Are the positions of records given by some subset of A002182? See also A065218, A340840. - Antti Karttunen, Jan 20 2025

#28 by Antti Karttunen at Mon Jan 20 16:39:21 EST 2025

COMMENTS

Question: Are the positions of records given by some subset of A002181A002182? - Antti Karttunen, Jan 20 2025

#27 by Antti Karttunen at Mon Jan 20 16:38:59 EST 2025

COMMENTS

Question: Are the positions of records given by some subset of A002181? - Antti Karttunen, Jan 20 2025

#26 by Antti Karttunen at Mon Jan 20 16:37:51 EST 2025

CROSSREFS

Cf. A002182, A005101, A033630, A085491, A359197, A357050, A379504.

STATUS

proposed

editing

#25 by Antti Karttunen at Mon Jan 20 16:32:21 EST 2025

STATUS

editing

proposed

#24 by Antti Karttunen at Mon Jan 20 16:32:14 EST 2025

LINKS

Antti Karttunen, <a href="/A359196/b359196_1.txt">Table of n, a(n) for n = 1..65537</a>

PROG

(PARI) A359196(n) = if(!n, 0, if(sigma(n)<=n, 1, my(p=1); fordiv(n, d, p *= (1 + 'x^d)); polcoeff(p, 1+n))); \\ Antti Karttunen, Jan 20 2025

CROSSREFS

Cf. A005101, A033630, A085491, A359197, A357050, A379504.

STATUS

approved

editing

#23 by Sean A. Irvine at Fri Jan 13 15:32:49 EST 2023

STATUS

proposed

approved