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A166259
Positive integers n such that a centered polygonal number n*k*(k+1)/2+1 is not a square for any k > 0.
2
2, 18, 32, 50, 72, 98, 128, 162, 200, 242, 338, 392, 450, 512, 578, 648, 722, 882, 968, 1058, 1152, 1250, 1352, 1458, 1682, 1800, 1922, 2048, 2178, 2312, 2401, 2450, 2662, 2738, 2809, 2888, 3042, 3174, 3200, 3362, 3528, 3698, 3750, 4050, 4225, 4232, 4418, 4489, 4608, 4802
OFFSET
1,1
COMMENTS
Positive integers n such that A120744(n) = -1.
LINKS
Eric Weisstein's World of Mathematics, Centered Polygonal Number.
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Oct 10 2009
EXTENSIONS
Edited and extended by Max Alekseyev, Jan 20 2010
STATUS
approved