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A027082
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Triangular array T read by rows: T(n,0)=1 for n >= 0, T(n,1)=T(n,2)=0 for n >= 1 and for n >= 2, T(n,k)=T(n-1,k-3)+T(n-1,k-2)+T(n-1,k-1) for 3<=k<=2n-1, T(n,2n)=T(n-1,2n-3)+T(n-1,2n-2).
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31
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1, 1, 1, 1, 1, 1, 1, 3, 2, 1, 1, 1, 3, 5, 6, 5, 1, 1, 1, 3, 5, 9, 14, 16, 11, 1, 1, 1, 3, 5, 9, 17, 28, 39, 41, 27, 1, 1, 1, 3, 5, 9, 17, 31, 54, 84, 108, 107, 68, 1, 1, 1, 3, 5, 9, 17, 31, 57, 102, 169, 246, 299, 283, 175, 1, 1, 1, 3, 5, 9, 17, 31, 57
(list; table; graph; refs; listen; history; internal format)
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