Triangle read by rows: T(n,k) = binomial(n,k)*(binomial(n-1,k-1)*binomial(n+1,k+1) + binomial(n-1,k)*binomial(n+1,k)), with T(0,0) = 1.

A174148

Triangle read by rows: T(n,k) = binomial(n,k)*(binomial(n-1,k-1)*binomial(n+1,k+1) + binomial(n-1,k)*binomial(n+1,k)), with T(0,0) = 1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =12a(5) =1a(6) =1a(7) =42a(8) =42a(9) =1a(10) =1a(11) =100a(12) =360a(13) =100a(14) =1a(15) =1a(16) =195a(17) =1700a(18) =1700a(19) =195a(20) =1a(21) =1a(22) =336a(23) =5775a(24) =14000a(25) =5775a(26) =336a(27) =1a(28) =1a(29) =532

External references