Sextuple factorial numbers: a(n) = Product_{k=0..n-1} (6*k+3).
A011781
Sextuple factorial numbers: a(n) = Product_{k=0..n-1} (6*k+3).
Terms
- a(0) =1a(1) =3a(2) =27a(3) =405a(4) =8505a(5) =229635a(6) =7577955a(7) =295540245a(8) =13299311025a(9) =678264862275
External references
- oeis: A011781