a(n) = ((6*n+9)(!^6))/9(!^6), related to A034723 (((6*n+3)(!^6))/3 sextic, or 6-factorials).
A053102
a(n) = ((6*n+9)(!^6))/9(!^6), related to A034723 (((6*n+3)(!^6))/3 sextic, or 6-factorials).
Terms
- a(0) =1a(1) =15a(2) =315a(3) =8505a(4) =280665a(5) =10945935a(6) =492567075a(7) =25120920825
External references
- oeis: A053102