28257

Appears in sequences

• a(n) = T(n, n-5), array T as in A055818.at n=14A055822
• Number of singular 2 X 2 matrices having all elements in {-n,...,n}.at n=25A209981
• Expansion of Product_{k>=1} (1 + k*x^k)/(1 + 2*x^k).at n=16A269154
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 377", based on the 5-celled von Neumann neighborhood.at n=33A271463
• Expansion of g.f. A(x) satisfying x = Sum_{n=-oo..+oo} (-1)^n * x^n * A(x)^n * (A(x)^n + x^n)^n.at n=8A361775