1,1

The terms of this sequence constitute a "proof" for the terms listed in A087285. To prove that a number is NOT in A087285, one can check the finite number (A081120) of solutions to the corresponding Mordell equation, cf. references in A081121.

Table of n, a(n) for n=1..59.

A087285(n) = A154333(a(n)) = a(n)^3 - [sqrt(a(n)^3 - 1)]^2 = A000578(a(n)) - A048760(a(n)^3-1).

(PARI) A154332(n) = { local(m); until(m++^3-sqrtint(m^3-1)^2==A087285[n], ); m }

Sequence in context: A046272 A054676 A181994 * A252595 A292158 A303729

Adjacent sequences: A154329 A154330 A154331 * A154333 A154334 A154335

nonn

M. F. Hasler, Jan 07 2009

approved