A011814 - OEIS

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

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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