A168257 - OEIS

A168257

Numbers k with property that 4 + 2*k + 3*k^3 is a square.

0, 1, 9, 784

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OFFSET

0,3

COMMENTS

4 + 2*k + 3*k^3 = m^2 with k = {0,1,9,784} = {0,1,3,28}^2, and m = 2,3,47,38022.

LINKS

PROG

(Magma)[n: n in [0..10000000]|IsSquare(4+2*n+3*n^3)] // Vincenzo Librandi, Dec 16 2010

CROSSREFS

KEYWORD

fini,full,nonn

AUTHOR

Zak Seidov, Nov 21 2009

STATUS

approved