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A033570
Pentagonal numbers with odd index: (2*n+1)*(3*n+1).
+0
7
1, 12, 35, 70, 117, 176, 247, 330, 425, 532, 651, 782, 925, 1080, 1247, 1426, 1617, 1820, 2035, 2262, 2501, 2752, 3015, 3290, 3577, 3876, 4187, 4510, 4845, 5192, 5551, 5922, 6305, 6700, 7107, 7526, 7957
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Maintained by
N. J. A. Sloane
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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.
AT&T Labs Research
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