A011811 M-sequences from multicomplexes on 4 variables with all monomials of degree 3 but none of degree larger than n.

0, 0, 0, 1, 36, 911, 20807, 468557, 10840767, 263427401, 6809977027, 188790121348, 5641465341098, 182310843939953, 6383884849646341, 242427118777826690, 9983217876902418734, 445432587418516596408

Offset

0,5

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..17.

Formula

a(n) = Sum_{k=3..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: A233003 A075916 A062150 * A167250 A218177 A107398

Adjacent sequences: A011808 A011809 A011810 * A011812 A011813 A011814

Keyword

nonn

Author

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

Extensions

Offset corrected by Sean A. Irvine, Jun 28 2018

Status

approved