50186

Appears in sequences

• Triangle, read by rows, equal to the matrix square of A113983.at n=48A113988
• Column 3 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+3,3).at n=6A113992
• The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {1,2,3,4} for all i from 1 to n-1.at n=9A174701
• Number of permutations p of {1,...,n} such that |p(i+1)-p(i)| < k, k=2,...,n; T(n,k), read by rows.at n=39A249631
• a(n) = A000011(n) - A256216(n).at n=31A256217