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

A136750

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =17a(6) =35a(7) =74a(8) =155a(9) =329a(10) =692a(11) =1464a(12) =3098a(13) =6553a(14) =13873a(15) =29361a(16) =62165a(17) =131638a(18) =278787a(19) =590357a(20) =1250337a(21) =2648108a(22) =5608735a(23) =11879607a(24) =25161906a(25) =53295451a(26) =112886028a(27) =239108343a(28) =506466366a(29) =1072776347

External references