Triangle generated by e.g.f.: A(x,y) = exp(x + y*(x^2+x^3)), read by rows of length [n/2+1].

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =12a(6) =1a(7) =36a(8) =12a(9) =1a(10) =80a(11) =180a(12) =1a(13) =150a(14) =1260a(15) =120a(16) =1a(17) =252a(18) =5460a(19) =3360a(20) =1a(21) =392a(22) =17640a(23) =43680a(24) =1680a(25) =1a(26) =576a(27) =46872a(28) =342720a(29) =75600