Expansion of g.f.: exp( Sum_{n>=1} A002203(n)^2 * x^n/n ) where A002203 are the companion Pell numbers.
A204062
Expansion of g.f.: exp( Sum_{n>=1} A002203(n)^2 * x^n/n ) where A002203 are the companion Pell numbers.
Terms
- a(0) =1a(1) =4a(2) =26a(3) =148a(4) =867a(5) =5048a(6) =29428a(7) =171512a(8) =999653a(9) =5826396a(10) =33958734a(11) =197925996a(12) =1153597255a(13) =6723657520a(14) =39188347880a(15) =228406429744
External references
- oeis: A204062