42633

Appears in sequences

• Table T(n,k), n>=1 and k>=0, read by antidiagonals, related to A111146.at n=42A113326
• a(n) = Sum_{k=0..n} 3^k*A111146(n,k).at n=6A113328
• Irregular triangle read by rows: T(n,k) is the number of primes with n balanced ternary digits of which 2k+1 (3 <= 2k+1 <= n) are nonzero.at n=39A277514
• a(n) = 2*a(n-1) - a(n-3) + a(ceiling(n/2)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=20A298404
• Numbers of graphs which are double triangle descendants of K_5 with four more vertices than triangles.at n=43A332735