Triangle read by rows: T(n, k) = (5*n-5*k+1)*T(n-1, k-1) +(5*k-4)*T(n-1, k) + 5*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

A144442

Triangle read by rows: T(n, k) = (5*n-5*k+1)*T(n-1, k-1) +(5*k-4)*T(n-1, k) + 5*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =17a(5) =1a(6) =1a(7) =118a(8) =118a(9) =1a(10) =1a(11) =729a(12) =2681a(13) =729a(14) =1a(15) =1a(16) =4400a(17) =41745a(18) =41745a(19) =4400a(20) =1a(21) =1a(22) =26431a(23) =555240a(24) =1349245a(25) =555240a(26) =26431a(27) =1a(28) =1a(29) =158622

External references