a(n) = (5*n+7)(!^5)/7(!^5), related to A034323 ((5*n+2)(!^5) quintic, or 5-factorials).
A051688
a(n) = (5*n+7)(!^5)/7(!^5), related to A034323 ((5*n+2)(!^5) quintic, or 5-factorials).
Terms
- a(0) =1a(1) =12a(2) =204a(3) =4488a(4) =121176a(5) =3877632a(6) =143472384a(7) =6025840128a(8) =283214486016
External references
- oeis: A051688