A260086 Smaller of amicable pair (x, y) as they are listed in A259933.

220, 1184, 2620, 5020, 6232, 10744, 12285, 17296, 66928, 67095, 63020, 69615, 79750, 100485, 122368, 122265, 141664, 142310, 171856, 176272, 185368, 196724, 280540, 308620, 319550, 356408, 437456, 469028, 503056, 522405, 600392, 609928, 643336, 624184, 635624, 667964, 726104, 802725, 879712, 898216, 998104, 947835

Offset

1,1

Comments

Another version of A002025.

First differs from A002025 at a(9).

Links

Table of n, a(n) for n=1..42.

Laszlo Hars, Performance compared to mathematica Julia-users (2014).

Khelleos, Amicable numbers, CyberForum.ru (2011).

OEIS Wiki, Amicable numbers (This page needs work).

Wikipédia, Barátságos számok (contains a mistake: A063990 should be replaced with A259933).

Formula

a(n) = A259933(2n-1) = A259953(n) - A259933(2n) = A259953(n) - A260087(n).

Crossrefs

Cf. A002025, A063990, A259180, A259933, A259953, A260087.

Sequence in context: A102073 A234969 A002025 * A339678 A339682 A241615

Adjacent sequences: A260083 A260084 A260085 * A260087 A260088 A260089

Keyword

nonn

Author

Omar E. Pol, Jul 15 2015

Extensions

a(25) corrected by Falk Hüffner, May 24 2026

Status

approved