a(n) = binomial(4+2*n, n) * binomial(9+2*n, 4+n).

A113857

a(n) = binomial(4+2*n, n) * binomial(9+2*n, 4+n).

Terms

    a(0) =126a(1) =2772a(2) =48048a(3) =772200a(4) =12033450a(5) =184940756a(6) =2824549728a(7) =43028530272a(8) =655081791000

External references