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A056520 (n+2)*(2*n^2-n+3)/6 +0
14
1, 2, 6, 15, 31, 56, 92, 141, 205, 286, 386, 507, 651, 820, 1016, 1241, 1497, 1786, 2110, 2471, 2871, 3312, 3796, 4325, 4901, 5526, 6202, 6931, 7715, 8556, 9456, 10417, 11441, 12530, 13686, 14911, 16207, 17576, 19020, 20541, 22141, 23822 (list; graph; listen)
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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.


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