31188

Appears in sequences

• Row 3 of array in A047666.at n=35A047667
• Number of length n 1..(2+2) arrays with no leading or trailing partial sum equal to a prime.at n=13A254198
• Number of unlabeled balanced rooted semi-identity trees with 2n-1 nodes and depth n.at n=23A306274
• Triangle T(n,d) read by rows: the number of mixed trees with n>=1 nodes and 0<=d<n arcs.at n=41A335362
• Number of nonnegative solutions to (x_1)^2 + (x_2)^2 + ... + (x_7)^2 <= n.at n=35A341402