Coefficients of (x^(1/4)*d/dx)^n for n positive integer.

Terms

a(0) =1a(1) =1a(2) =4a(3) =-1a(4) =6a(5) =8a(6) =5a(7) =-10a(8) =48a(9) =32a(10) =-10a(11) =15a(12) =-10a(13) =80a(14) =32a(15) =110a(16) =-145a(17) =90a(18) =40a(19) =480a(20) =128a(21) =-770a(22) =945a(23) =-560a(24) =140a(25) =560a(26) =1344a(27) =256a(28) =-13090a(29) =15365