Triangle of coefficients of a sequence of binomial type polynomials.

Terms

a(0) =2a(1) =2a(2) =4a(3) =6a(4) =12a(5) =8a(6) =26a(7) =60a(8) =48a(9) =16a(10) =150a(11) =380a(12) =360a(13) =160a(14) =32a(15) =1082a(16) =2940a(17) =3120a(18) =1680a(19) =480a(20) =64a(21) =9366a(22) =26908a(23) =31080a(24) =19040a(25) =6720a(26) =1344a(27) =128a(28) =94586a(29) =284508