G.f.: A(x) = exp( Sum_{n>=1} G_n(x^n)*x^n/n ) such that G_n(x^n) = Product_{k=0..n-1} A(u^k*x) where u is an n-th root of unity.
A203254
G.f.: A(x) = exp( Sum_{n>=1} G_n(x^n)*x^n/n ) such that G_n(x^n) = Product_{k=0..n-1} A(u^k*x) where u is an n-th root of unity.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =22a(6) =62a(7) =146a(8) =422a(9) =1084a(10) =3160a(11) =8064a(12) =25190a(13) =65204a(14) =198652a(15) =545790a(16) =1680122a(17) =4495548a(18) =14352768a(19) =38665478a(20) =122530052a(21) =343978146a(22) =1072985932a(23) =2947659006a(24) =9662067644a(25) =26573691092a(26) =84395544446a(27) =241295995524a(28) =769819399580
External references
- oeis: A203254