Related to triple factorial numbers A007559(n+1).
A034171
Related to triple factorial numbers A007559(n+1).
Terms
- a(0) =1a(1) =6a(2) =42a(3) =315a(4) =2457a(5) =19656a(6) =160056a(7) =1320462a(8) =11003850a(9) =92432340a(10) =781473420a(11) =6642524070a(12) =56716936290a(13) =486145168200
External references
- oeis: A034171