2571620

Appears in sequences

• Triangle P, read by rows, where column k of P^3 equals column 0 of P^(3k+3) such that column 0 of P^3 equals column 0 of P shift one row up, with P(0,0)=1.at n=48A136220
• Column 3 of triangle A136220; also equals column 0 of U^4 where U = A136228.at n=6A136224