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A001108
a(n)-th triangular number is a square: a(n+1) = 6*a(n)-a(n-1)+2, with a(0) = 0, a(1) = 1.
(Formerly M4536 N1924)
+0
25
0, 1, 8, 49, 288, 1681, 9800, 57121, 332928, 1940449, 11309768, 65918161, 384199200, 2239277041, 13051463048, 76069501249, 443365544448, 2584123765441, 15061377048200, 87784138523761, 511643454094368
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 5 20:25 EST 2009. Contains 170428 sequences.
AT&T Labs Research
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