48630

Appears in sequences

• Number of forests of identical trees.at n=17A035054
• Numbers k > 1 such that, in base 5, k and k^2 contain the same digits in the same proportion.at n=18A061659
• Number of simple unlabeled graphs on n nodes with exactly 1 connected component that is a tree or a cycle.at n=16A215981
• Number of binary words of length n with all distinct run-lengths.at n=28A351017
• G.f. A(x) = Product_{n>=1} P(n,x), where P(1,x) = 1/sqrt(1-4*x), and P(n+1,x) = 1/sqrt(1 - 4*x + 4*x/P(n,x)) for n >= 1.at n=8A351511
• G.f. A(x,y) = lim_{N->infinity} (1 - P(N,x,y))/(2*x)^N, where P(0,x,y) = -y, and P(n+1,x,y) = sqrt(1 - 4*x + 4*x*P(n,x,y)) for n = 0..N-1.at n=45A352093
• Numbers k such that (prime(j)-1)^2 + 1 is prime for k <= j <= k + 2.at n=31A376522