202741

Appears in sequences

• E.g.f. 1/(2-cosh(x)) (even coefficients).at n=5A094088
• Triangle read by rows. The coefficients in ascending order of x^i of the polynomials p{0}(x) = 1 and p{n}(x) = Sum_{k=0..n-1; k even} binomial(n, k) * p{k}(0)*(1 - n%2 + x^(n - k)).at n=55A214407
• Number of m-shape ordered set partitions, square array read by ascending antidiagonals, A(m, n) for m, n >= 0.at n=33A260883
• a(n) is the number of chains from {} to a top element in the poset of even sized subsets of {1,2,...,n} ordered by inclusion.at n=10A336012
• Triangle read by rows, T(n, k) = A094088(n) * binomial(n, k).at n=15A362586
• Triangle read by rows, T(n, k) = A094088(n) * binomial(n, k).at n=20A362586
• E.g.f.: (exp(-x) - exp(x) - 2)/(exp(-x) + exp(x) - 4).at n=10A375381