63370

Appears in sequences

• G.f. 1/(1-sum(n=1,N,x^(n*(3*n-1)/2))).at n=40A181324
• G.f.: A(x) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n,k)^2 * x^k*(1-x)^k ).at n=18A217282
• The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points.at n=19A330851
• Number of subsets of {1..n} containing n such that it is not possible to choose a different binary index of each element.at n=17A370589