A011814 M-sequences from multicomplexes on 4 variables with all monomials of degree 6 but none of degree larger than n.

0, 0, 0, 0, 0, 0, 1, 121, 9274, 588336, 34169279, 1910015056, 105715598909, 5894822718103, 334864912935350, 19523280973963941, 1174121560958610835, 73092687563740003227, 4721840282194948355236

Offset

0,8

References

S. Linusson, The number of M-sequences and f-vectors, Combinatorica, 19 (1999), 255-266.

Links

Table of n, a(n) for n=0..18.

Formula

a(n) = Sum_{k=6..n} L(4, n, k) where L(p, n, k) = Sum_{i=k..n} L(p-1, n, i) * L(p, i-1, k-1) with boundary conditions L(p, n, n) = L(p, n, -1) = 1 (p >= 0, n >= -1), L(0, n, k) = 0 (0 <= k < n) [from Linusson]. - Sean A. Irvine, Jun 28 2018

Crossrefs

Sequence in context: A212802 A272775 A018849 * A238320 A144766 A277946

Adjacent sequences: A011811 A011812 A011813 * A011815 A011816 A011817

Keyword

nonn

Author

Svante Linusson (linusson(AT)math.kth.se)

Extensions

Offset corrected by Sean A. Irvine, Jun 28 2018

Status

approved