A011804 M-sequences from multicomplexes on at most 7 variables with no monomial of degree more than n-1.

2, 9, 93, 1899, 70506, 4486435, 463830877, 74407044673, 17824974050808, 6177590123863188, 3015767999171508360, 2026808543279157951071, 1838007806558686610254487, 2209395428479037427756551320

Offset

0,1

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..13.

Formula

a(n) = Sum_{k=-1..n} L(7, 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

Cf. A007065, A007625, A011805, A011806, A011807, A011808, A011809.

Sequence in context: A240650 A356566 A365363 * A292467 A291622 A058156

Adjacent sequences: A011801 A011802 A011803 * A011805 A011806 A011807

Keyword

nonn

Author

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

Extensions

Offset corrected by Sean A. Irvine, Jun 28 2018

Status

approved