40731

Appears in sequences

• a(n) = a(n-1) + a(n-2) + a(n-3).at n=17A007486
• a(n+1) = Sum_{k=0..floor(3*n/4)} a(k) * a(n-k).at n=15A030035
• 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=30A136220
• Column 2 of triangle A136220; also equals column 0 of U^3 = A136236 where U = A136228.at n=5A136223
• Matrix cube of triangle U = A136228, read by rows.at n=15A136236