214277011200
domain: N
Appears in sequences
- Triple factorial numbers a(n) = n!!!, defined by a(n) = n*a(n-3), a(0) = a(1) = 1, a(2) = 2. Sometimes written n!3.at n=30A007661
- Triple factorial numbers: (3n)!!! = 3^n*n!.at n=10A032031
- a(n)=-1/b(2n) where 1/(e^y-e^(y/3))= sum(i=-1,inf,b(i)*y^i).at n=5A068181
- Triple factorials n!!!: a(n) = n*a(n-3).at n=30A161474