G.f.: A(x) = exp( Sum_{n>=1} (1 + 2*A006519(n)*x)^n * x^n/n ) where A006519(n) is the highest power of 2 dividing n.
A163572
G.f.: A(x) = exp( Sum_{n>=1} (1 + 2*A006519(n)*x)^n * x^n/n ) where A006519(n) is the highest power of 2 dividing n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =19a(5) =39a(6) =169a(7) =765a(8) =2183a(9) =4131a(10) =11561a(11) =55157a(12) =666381a(13) =8175433a(14) =68536455a(15) =355280675a(16) =1048740623a(17) =1931107235a(18) =5055100985a(19) =13108206741a(20) =38734589993a(21) =143320957605
External references
- oeis: A163572