G.f.: A(x) = exp( Sum_{n>=1} 2^[A001511(n)^2]*x^n/n ) where A001511(n) is the exponent in the highest power of 2 that divides 2n.

A180591

G.f.: A(x) = exp( Sum_{n>=1} 2^[A001511(n)^2]*x^n/n ) where A001511(n) is the exponent in the highest power of 2 that divides 2n.

Terms

    a(0) =1a(1) =2a(2) =10a(3) =18a(4) =178a(5) =338a(6) =1450a(7) =2562a(8) =23234a(9) =43906a(10) =186602a(11) =329298a(12) =2276914a(13) =4224530a(14) =16898506a(15) =29572482a(16) =191488770a(17) =353405058a(18) =1394069578a(19) =2434734098a(20) =14073489714a(21) =25712245330a(22) =97969052778a(23) =170225860226a(24) =938475356354

External references