Coefficients of the Omega polynomials of order 2, triangle T(n,k) read by rows with 0<=k<=n.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =-2a(5) =3a(6) =0a(7) =16a(8) =-30a(9) =15a(10) =0a(11) =-272a(12) =588a(13) =-420a(14) =105a(15) =0a(16) =7936a(17) =-18960a(18) =16380a(19) =-6300a(20) =945a(21) =0a(22) =-353792a(23) =911328a(24) =-893640a(25) =429660a(26) =-103950a(27) =10395a(28) =0a(29) =22368256