E.g.f.: (1-x)^2/(1-3*x+x^2).
A052567
E.g.f.: (1-x)^2/(1-3*x+x^2).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =48a(4) =504a(5) =6600a(6) =103680a(7) =1900080a(8) =39795840a(9) =937681920a(10) =24548832000a(11) =706966444800
External references
- oeis: A052567
A052567
E.g.f.: (1-x)^2/(1-3*x+x^2).