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A038362
Two different numbers a, b which satisfy sigma(a)=sigma(b)=(a+b)^3/(a^2+b^2) are called a rational amicable pair; sequence gives a numbers.
1
26403469440047700, 7664549986025275200, 31637331117119006822400, 8100083754075263764070400, 129602081655678458639155200, 132712784683164075505282252800
OFFSET
1,1
COMMENTS
These are just the known values. There is no proof that this sequence is correct (in the usual sense that there are no other terms below the last term shown). - N. J. A. Sloane, Nov 07 2006
Factorization: 2^(n-1)*M(n)*3*5^2*13*31*139*277*3877*11*19 where M(n) is Mersenne Prime, n=3 or 5<n.
LINKS
Eric Weisstein's World of Mathematics, Rational Amicable Pair.
CROSSREFS
Cf. A038363.
Sequence in context: A080127 A003941 A003934 * A038363 A204189 A317163
KEYWORD
nonn,more
STATUS
approved