Triangular array, read by rows: T(n,k) = [(w*x*y*z)^k] (-1 + (1 + w + 1/w)*(1 + x + 1/x)*(1 + y + 1/y)*(1 + z + 1/z))^n for -n <= k <= n.
A329820
Triangular array, read by rows: T(n,k) = [(w*x*y*z)^k] (-1 + (1 + w + 1/w)*(1 + x + 1/x)*(1 + y + 1/y)*(1 + z + 1/z))^n for -n <= k <= n.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =14a(6) =80a(7) =14a(8) =1a(9) =1a(10) =78a(11) =1251a(12) =2160a(13) =1251a(14) =78a(15) =1a(16) =1a(17) =252a(18) =9682a(19) =60444a(20) =121200a(21) =60444a(22) =9682a(23) =252a(24) =1a(25) =1a(26) =620a(27) =49355a(28) =760800a(29) =3785750
External references
- oeis: A329820