O.g.f.: Sum_{n>=0} 3*(n+3)^(n-1)*x^n/(1+n*x)^n.
A195255
O.g.f.: Sum_{n>=0} 3*(n+3)^(n-1)*x^n/(1+n*x)^n.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =51a(4) =234a(5) =1179a(6) =6624a(7) =41931a(8) =300078a(9) =2420307a(10) =21841812a(11) =218595267a(12) =2405079378a(13) =28862546859a(14) =375217892136
External references
- oeis: A195255