Column 2 of triangle A128545; a(n) is the coefficient of q^(2n+4) in the central q-binomial coefficient [2n+4,n+2].
A128552
Column 2 of triangle A128545; a(n) is the coefficient of q^(2n+4) in the central q-binomial coefficient [2n+4,n+2].
Terms
- a(0) =1a(1) =3a(2) =8a(3) =18a(4) =39a(5) =75a(6) =141a(7) =251a(8) =433a(9) =724a(10) =1185a(11) =1892a(12) =2972a(13) =4588a(14) =6981a(15) =10480a(16) =15553a(17) =22821a(18) =33164a(19) =47746a(20) =68163a(21) =96542a(22) =135747a(23) =189550a(24) =262997a(25) =362691a(26) =497339a(27) =678300a(28) =920417a(29) =1242898
External references
- oeis: A128552