131766

Appears in sequences

• a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026648.at n=8A026972
• Main diagonal of number array A082105.at n=19A082106
• Number of ways to place n nonattacking composite pieces rook + rider[1,4] on an n X n chessboard.at n=9A189851
• Smallest palindromic number of 5 digits in two bases differing by n.at n=7A216899