Triangle read by rows: T(n, k) = (6*n-6*k+1)*T(n-1, k-1) + (6*k-5)*T(n-1, k) + 6*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

A144443

Triangle read by rows: T(n, k) = (6*n-6*k+1)*T(n-1, k-1) + (6*k-5)*T(n-1, k) + 6*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =20a(5) =1a(6) =1a(7) =159a(8) =159a(9) =1a(10) =1a(11) =1138a(12) =4254a(13) =1138a(14) =1a(15) =1a(16) =7997a(17) =77878a(18) =77878a(19) =7997a(20) =1a(21) =1a(22) =56016a(23) =1219167a(24) =2984888a(25) =1219167a(26) =56016a(27) =1a(28) =1a(29) =392155

External references