%I #7 Jun 28 2018 17:59:27
%S 0,0,0,1,36,911,20807,468557,10840767,263427401,6809977027,
%T 188790121348,5641465341098,182310843939953,6383884849646341,
%U 242427118777826690,9983217876902418734,445432587418516596408
%N M-sequences from multicomplexes on 4 variables with all monomials of degree 3 but none of degree larger than n.
%D S. Linusson, The number of M-sequences and f-vectors, Combinatorica, 19 (1999), 255-266.
%F 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
%K nonn
%O 0,5
%A Svante Linusson (linusson(AT)math.kth.se)
%E Offset corrected by _Sean A. Irvine_, Jun 28 2018