42771456

Appears in sequences

• Triangle read by rows, coefficients of the polynomials P(m, n) = Sum_{k=1..n} binomial(m*n, m*k)* P(m, n-k)*z with P(m, 0) = 1 and m = 3.at n=24A278073
• Central coefficients of the polynomials defined in A278073.at n=3A281479
• a(n) = n^2 * 2^n * binomial(3*n, n).at n=6A378778