Triangle S(n,k) by rows: coefficients of 4^((n-1)/2)*(x^(1/4)*d/dx)^n when n is odd, and of 4^(n/2)*(x^(3/4)*d/dx)^n when n is even.

A223170

Triangle S(n,k) by rows: coefficients of 4^((n-1)/2)*(x^(1/4)*d/dx)^n when n is odd, and of 4^(n/2)*(x^(3/4)*d/dx)^n when n is even.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =5a(4) =4a(5) =5a(6) =40a(7) =16a(8) =45a(9) =72a(10) =16a(11) =45a(12) =540a(13) =432a(14) =64a(15) =585a(16) =1404a(17) =624a(18) =64a(19) =585a(20) =9360a(21) =11232a(22) =3328a(23) =256a(24) =9945a(25) =31824a(26) =21216a(27) =4352a(28) =256a(29) =9945

External references