134190

Appears in sequences

• Coefficients of the expansion in 1/(2d) of the Green function G(0,1) for brownian motion.at n=8A105227
• Triangular array read by rows: T(n,k) is the number of endofunctions f:{1,2,...,n}-> {1,2,...,n} whose largest component has exactly k nodes; n>=1, 1<=k<=n.at n=24A209324
• a(n) = Sum_{i=1..n} (3i)^2.at n=35A220443
• Triangular array read by rows: T(n,k) is the number of size k components in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}; n>=1, 1<=k<=n.at n=24A225723
• Let s(k) denote the sum of the even proper divisors of k. The sequence lists the pairs of numbers (x, y) such that s(x) = y and s(y) = x.at n=19A279812
• List of ordered pairs (x, y) from A279812.at n=20A279950