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

Author

Omar E. Pol, Nov 09 2015

Keywords

• nonn
• tabf

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

Crossrefs

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

Programs

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