A011817 M-sequences from multicomplexes on 4 variables with all monomials of degree 9 but none of degree larger than n.

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 287, 49414, 6721391, 803816457, 89294859907, 9517387613809, 993526926534580, 102994962998587912, 10705388607233154107, 1123359305409427947266

Offset

0,11

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..19.

Formula

a(n) = Sum_{k=9..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: A158287 A112245 A289339 * A334008 A035882 A244512

Adjacent sequences: A011814 A011815 A011816 * A011818 A011819 A011820

Keyword

nonn

Author

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

Extensions

Offset corrected by Sean A. Irvine, Jun 28 2018

Status

approved