61951

Appears in sequences

• Number of chains in the power set lattice of an (n+3)-element set X_(n+3) of specification n^1 2^1 1, that is, n identical objects of one kind, 2 identical objects of another kind and one other kind. It is the same as the number of fuzzy subsets X_(n+3).at n=6A107953
• a(n) = 1250*n^2 + 100*n + 1.at n=6A154375
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 203", based on the 5-celled von Neumann neighborhood.at n=36A286674
• Bases in which 11 is a unique-period prime.at n=37A306076
• G.f. A(x) satisfies A(x) = 1 + x*(1+x^2)^2*A(x)^3.at n=8A385065