E.g.f.: exp(4)*P(x) - Q(x), where P(x) = 1/Product_{n>=1} (1 - x^n/n) and Q(x) = Sum_{n>=1} 4^n/Product_{k=1..n} (k - x^k).
A249477
E.g.f.: exp(4)*P(x) - Q(x), where P(x) = 1/Product_{n>=1} (1 - x^n/n) and Q(x) = Sum_{n>=1} 4^n/Product_{k=1..n} (k - x^k).
Terms
- a(0) =1a(1) =1a(2) =7a(3) =47a(4) =360a(5) =2884a(6) =26068a(7) =250140a(8) =2659544a(9) =30188024a(10) =373401768a(11) =4911407656a(12) =69701336160
External references
- oeis: A249477