187432960
domain: N
Appears in sequences
- 5-fold convolution of A000302 (powers of 4); expansion of 1/(1-4*x)^5.at n=9A040075
- Odd powers of 2 multiplied by Catalan numbers.at n=9A052707
- 10-fold convolution of A000302 (powers of 4).at n=7A054340
- a(n) = ((3*n)!/n!^2)*(Gamma(1+n/2)/Gamma(1+3n/2)).at n=9A091527
- Expansion of g.f.: Catalan(x)/Catalan(-x).at n=17A349648
- Square array read by ascending antidiagonals: T(n,k) = [x^(3*k)] ( (1 + x)^(n+3)/(1 - x)^(n-3) )^k for n, k >= 0.at n=48A364519