140941

Appears in sequences

• Triangular array read by rows: T(n,1) = T(n,n) = 1, T(n,k) = 3*T(n-1,k-1) + 2*T(n-1,k).at n=50A119725
• Non-palindromic composite numbers such that n' = [Rev(n)]', where n' is the arithmetic derivative of n.at n=20A259077