E.g.f. (1-x)/(1-2x-x^2).
A052608
E.g.f. (1-x)/(1-2x-x^2).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =42a(4) =408a(5) =4920a(6) =71280a(7) =1204560a(8) =23264640a(9) =505491840a(10) =12203654400a(11) =324084499200
External references
- oeis: A052608
A052608
E.g.f. (1-x)/(1-2x-x^2).