G.f.: A(x) = exp( 2*Sum_{n>=1} A006519(n)^2 * x^n/n ), where A006519(n) = highest power of 2 dividing n.

A162581

G.f.: A(x) = exp( 2*Sum_{n>=1} A006519(n)^2 * x^n/n ), where A006519(n) = highest power of 2 dividing n.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =10a(4) =26a(5) =42a(6) =86a(7) =130a(8) =258a(9) =386a(10) =694a(11) =1002a(12) =1754a(13) =2506a(14) =4134a(15) =5762a(16) =9346a(17) =12930a(18) =20198a(19) =27466a(20) =42330a(21) =57194a(22) =85750a(23) =114306a(24) =169602a(25) =224898a(26) =326934a(27) =428970a(28) =618138a(29) =807306

External references