A262622 Amicable pairs of even numbers.

220, 284, 1184, 1210, 2620, 2924, 5020, 5564, 6232, 6368, 10744, 10856, 17296, 18416, 63020, 76084, 66928, 66992, 79750, 88730, 122368, 123152, 141664, 153176, 142310, 168730, 171856, 176336, 176272, 180848, 185368, 203432, 196724, 202444, 280540, 365084, 308620, 389924, 319550, 430402, 356408, 399592, 437456, 455344

Offset

1,1

Comments

If there are no amicable pairs whose members have distinct parity then this is also the even terms of A259180.

First differs from A063990, A259180, A259933 at a(13).

First differs from A262624 at a(16).

Links

Amiram Eldar, Table of n, a(n) for n = 1..20000

Prog

(PARI) listap(nn) = {forstep(n=2, nn, 2, m = sigma(n)-n; if ((m > n) && (n==sigma(m)-m), print1(n, ", ", m, ", ")); ); } \\ Michel Marcus, Nov 14 2015

Crossrefs

Cf. A002025, A002046, A005843, A063990, A259180, A259933, A262623, A262624.

Sequence in context: A259933 A273259 A262624 * A287026 A233538 A328063

Adjacent sequences: A262619 A262620 A262621 * A262623 A262624 A262625

Keyword

nonn,tabf

Author

Omar E. Pol, Nov 09 2015

Status

approved