A262623 Amicable pairs of odd numbers.

12285, 14595, 67095, 71145, 69615, 87633, 100485, 124155, 122265, 139815, 522405, 525915, 802725, 863835, 947835, 1125765, 1175265, 1438983, 1280565, 1340235, 1358595, 1486845, 1798875, 1870245, 4482765, 5120595, 5357625, 5684679, 5730615, 6088905, 6377175, 6680025, 8619765, 9627915, 9071685, 9498555, 9206925, 10791795

Offset

1,1

Comments

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

First differs from A262625 at a(4).

References

Song Y. Yan, Perfect, Amicable and Sociable Numbers. A Computational Approach, World Scientific, 1996, pages 151 - 153.

Links

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

Sergei Chernykh, Amicable pairs list

Prog

(PARI) lista(nn) = {forstep(n=1, 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, A005408, A063990, A259180, A262622, A262625.

Sequence in context: A358320 A358022 A262625 * A140688 A137489 A233900

Adjacent sequences: A262620 A262621 A262622 * A262624 A262625 A262626

Keyword

nonn,tabf

Author

Omar E. Pol, Nov 09 2015

Status

approved