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A084604 Triangle, read by rows, where the n-th row lists the (2n+1) coefficients of (1+x+4x^2)^n. +0
3
1, 1, 1, 4, 1, 2, 9, 8, 16, 1, 3, 15, 25, 60, 48, 64, 1, 4, 22, 52, 145, 208, 352, 256, 256, 1, 5, 30, 90, 285, 561, 1140, 1440, 1920, 1280, 1024, 1, 6, 39, 140, 495, 1206, 2841, 4824, 7920, 8960, 9984, 6144, 4096, 1, 7, 49, 203, 791, 2261, 6027, 12489, 24108, 36176 (list; table; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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