Triangular array, read by rows: T(n,k) = [(x*y*z)^k] (-1 + (1 + x + 1/x)*(1 + y + 1/y)*(1 + z + 1/z))^n for -n <= k <= n.

A329819

Triangular array, read by rows: T(n,k) = [(x*y*z)^k] (-1 + (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) =6a(6) =26a(7) =6a(8) =1a(9) =1a(10) =24a(11) =195a(12) =264a(13) =195a(14) =24a(15) =1a(16) =1a(17) =60a(18) =898a(19) =3276a(20) =5646a(21) =3276a(22) =898a(23) =60a(24) =1a(25) =1a(26) =120a(27) =3065a(28) =22260a(29) =72730

External references