3618540

Appears in sequences

• Hyperbinomial transform of A089467 and also the 2nd hyperbinomial transform of A089466.at n=7A089468
• Triangle read by rows: T(n,k) (0 <= k <= n) = Sum_{i=0..[k/2]} (-1)^i*binomial(k,2*i)*(2*i-1)!!*n^(k-2*i).at n=52A244490
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood.at n=10A271161
• Array read by antidiagonals: T(n,k) is the number of functions f: X->Y, where X is a subset of Y, |X| = n, |Y| = n+k, such that for every x in X, f(f(x)) != x.at n=62A334014