267688

Appears in sequences

• a(n) = Pell(n) * A004018(n) for n>=1 with a(0)=1, where A004018(n) is the number of ways of writing n as a sum of 2 squares.at n=13A205508
• E.g.f. satisfies A(x) = exp(x * A(x)^(x/2)).at n=9A362572