E.g.f. (1-2x)/(1-2x-x^2).
A052580
E.g.f. (1-2x)/(1-2x-x^2).
Terms
- a(0) =1a(1) =0a(2) =2a(3) =12a(4) =120a(5) =1440a(6) =20880a(7) =352800a(8) =6814080a(9) =148055040a(10) =3574368000a(11) =94922150400
External references
- oeis: A052580
A052580
E.g.f. (1-2x)/(1-2x-x^2).