Numerator of Product_{j=1..n-1} ((3*j+1)/(3*j+2)).

Terms

a(0) =1a(1) =4a(2) =7a(3) =7a(4) =13a(5) =104a(6) =494a(7) =988a(8) =190a(9) =5320a(10) =20615a(11) =589a(12) =1147a(13) =11470a(14) =246605a(15) =246605a(16) =2416729a(17) =62834954a(18) =4488211a(19) =4488211a(20) =8831641a(21) =10869712a(22) =182067676a(23) =2548947464a(24) =2514502228a(25) =27300309904a(26) =134795280151a(27) =269590560302a(28) =3134773957a(29) =25078191656