Exponential (binomial) convolution of A001818 (with interspersed zeros) and A000142 (factorials).
A111601
Exponential (binomial) convolution of A001818 (with interspersed zeros) and A000142 (factorials).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =225a(5) =1350a(6) =11025a(7) =88200a(8) =893025a(9) =8930250a(10) =108056025a(11) =1296672300a(12) =18261468225a(13) =255660555150
External references
- oeis: A111601