G.f.: exp( Sum_{n>=1} A002203(n)^4 * x^n/n ), where A002203 is the companion Pell numbers.

A215171

G.f.: exp( Sum_{n>=1} A002203(n)^4 * x^n/n ), where A002203 is the companion Pell numbers.

Terms

    a(0) =1a(1) =16a(2) =776a(3) =23856a(4) =834596a(5) =28135056a(6) =957599096a(7) =32515276336

External references