571225

Appears in sequences

• Fourth convolution of A001045(n+1) (generalized (1,2)-Fibonacci), n>=0, with itself.at n=11A073374
• Triangle U, read by rows, where column k of U^(j+1) = column j of P^(3k+1) for j>=0, k>=0 and P=A136220.at n=39A136228