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A011812 M-sequences from multicomplexes on 4 variables with all monomials of degree 4 but none of degree larger than n. 0
0, 0, 0, 0, 1, 57, 2185, 72881, 2322629, 73949186, 2410067138, 81563004129, 2892108485341, 108078014350565, 4273605661408932, 179311027612775138, 7999342346440002428, 379986003510210048053, 19238835001520254448553 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

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=4..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: A229407 A270502 A285238 * A226848 A022231 A239823

Adjacent sequences:  A011809 A011810 A011811 * A011813 A011814 A011815

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

Offset corrected by Sean A. Irvine, Jun 28 2018

STATUS

approved

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Last modified October 26 11:29 EDT 2020. Contains 338027 sequences. (Running on oeis4.)