312741

Appears in sequences

• Expansion of 1/(1-3*x)^9; 9-fold convolution of A000244 (powers of 3).at n=5A036222
• Expansion of g.f. c(3x)^2, where c(x) is the g.f. of A000108.at n=6A101600
• Riordan array (1, x*c(3x)), c(x) the g.f. of A000108.at n=38A110518
• a(n) = 3^5 * binomial(n+4, 5).at n=8A113335