

A291550


Even amicable pairs whose sum is not divisible by 9.


1



666030256, 696630544, 967947856, 1031796176, 2840437756, 3156691844, 4150593232, 4213181968, 4796703664, 4855069456, 10168398448, 11159012552, 33707179456, 33844856128, 53151801712, 55270703248, 62393407792, 65270990608, 107122129216, 107620508608, 284624443948, 287125556692
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OFFSET

1,1


COMMENTS

Most even amicable pairs have a sum which is divisible by 9; for instance, the sum of (220, 284) is 504.


LINKS

Table of n, a(n) for n=1..22.
Elvin Lee, On divisibility by nine of the sums of even amicable pairs, Math. Comp. 23 (1969), 545548.


EXAMPLE

(666030256, 696630544) is an amicable pair whose sum is 571750000640 == 8 (mod 9).


CROSSREFS

Cf. A063990, A180164, A259180, A291422.
Sequence in context: A290039 A289958 A263894 * A234071 A234795 A035795
Adjacent sequences: A291547 A291548 A291549 * A291551 A291552 A291553


KEYWORD

nonn,tabf


AUTHOR

Michel Marcus, Aug 26 2017


STATUS

approved



