G.f.: A(x) = ...o x/(1-x^8) o x/(1-x^4) o x/(1-x^2) o x/(1-x), composition of functions x/(1 - x^{2^n}) for n=...,3,2,1,0.

A136753

G.f.: A(x) = ...o x/(1-x^8) o x/(1-x^4) o x/(1-x^2) o x/(1-x), composition of functions x/(1 - x^{2^n}) for n=...,3,2,1,0.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =21a(6) =52a(7) =134a(8) =355a(9) =955a(10) =2590a(11) =7052a(12) =19246a(13) =52638a(14) =144368a(15) =397468a(16) =1099720a(17) =3060936a(18) =8577496a(19) =24210808a(20) =68843806a(21) =197176726a(22) =568585576a(23) =1649739332a(24) =4812731846a(25) =14105205846a(26) =41498665884a(27) =122469937048

External references