a(n) = (6^n/n!) * Product_{k=0..n-1} ( 6*k + 11 ).
A004998
a(n) = (6^n/n!) * Product_{k=0..n-1} ( 6*k + 11 ).
Terms
- a(0) =1a(1) =66a(2) =3366a(3) =154836a(4) =6735366a(5) =282885372a(6) =11598300252a(7) =467245810152
External references
- oeis: A004998