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A038363
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 b numbers.
1
30193441130006700, 8764724625167659200, 36178574818140873830400, 9262775202028650907238400, 148205251271326084281139200, 2315711466905235330372675
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*239 where M(n) is Mersenne Prime, n=3 or 5<n.
LINKS
Eric Weisstein's World of Mathematics, Rational Amicable Pair.
CROSSREFS
Cf. A038362.
Sequence in context: A003941 A003934 A038362 * A204189 A317163 A051167
KEYWORD
nonn,more
STATUS
approved