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A122888 Triangle, read by rows, where row n lists the coefficients of x^k, k=1..2^n, in the n-th self-composition of (x + x^2) for n>=0. +0
27
1, 1, 1, 1, 2, 2, 1, 1, 3, 6, 9, 10, 8, 4, 1, 1, 4, 12, 30, 64, 118, 188, 258, 302, 298, 244, 162, 84, 32, 8, 1, 1, 5, 20, 70, 220, 630, 1656, 4014, 8994, 18654, 35832, 63750, 105024, 160120, 225696, 293685, 352074, 387820, 391232, 359992, 300664, 226580 (list; graph; listen)
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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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