a(n) = -Product_{k=0..n} (7*k-1); sept-factorial numbers.
A049209
a(n) = -Product_{k=0..n} (7*k-1); sept-factorial numbers.
Terms
- a(0) =1a(1) =6a(2) =78a(3) =1560a(4) =42120a(5) =1432080a(6) =58715280a(7) =2818333440a(8) =155008339200
External references
- oeis: A049209