Irregular triangle read by rows: coefficients of q-Eulerian polynomials of Type B.

Terms

a(0) =1a(1) =1a(2) =4a(3) =1a(4) =20a(5) =1a(6) =72a(7) =80a(8) =1a(9) =232a(10) =976a(11) =1a(12) =716a(13) =7664a(14) =3904a(15) =1a(16) =2172a(17) =49776a(18) =88640a(19) =1a(20) =6544a(21) =292320a(22) =1217792a(23) =354560a(24) =1a(25) =19664a(26) =1618656a(27) =13201664a(28) =12933376a(29) =1