27092

Appears in sequences

• Number of bracelets (turnover necklaces) of n beads of 2 colors, 7 of them black.at n=22A032280
• a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i), array T as in A049723.at n=36A049726
• Number of reduced words of length n in the Weyl group B_12.at n=7A161858
• Number of reduced words of length n in the Weyl group D_12.at n=7A162297
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 307", based on the 5-celled von Neumann neighborhood.at n=33A271166
• Number of plane trees of total weight n of combinatorial class T=Z*U + Z*T^2/(1-T) with nodes Z of weight one and leaves U of weight three.at n=47A331106
• a(n) is the total number of vertices of degree 2 in Catalan word grid graphs with n parts.at n=7A390115