Column 3 of triangle A128596; a(n) = coefficient of q^(3n+9) in the q-analog of the even double factorials (2n+6)!! for n>=0.
A128598
Column 3 of triangle A128596; a(n) = coefficient of q^(3n+9) in the q-analog of the even double factorials (2n+6)!! for n>=0.
Terms
- a(0) =1a(1) =24a(2) =297a(3) =3210a(4) =32510a(5) =318171a(6) =3054100a(7) =28980565a(8) =273077443a(9) =2562036673a(10) =23973009386a(11) =223949654108
External references
- oeis: A128598