Coefficients of 1/(Sum_{k>=0} [(k+1)*r]*(-x)^k), where r = 4^(1/3) and [ ] = floor.

Terms

a(0) =1a(1) =3a(2) =5a(3) =9a(4) =18a(5) =36a(6) =71a(7) =138a(8) =268a(9) =522a(10) =1017a(11) =1981a(12) =3859a(13) =7517a(14) =14642a(15) =28521a(16) =55557a(17) =108223a(18) =210814a(19) =410654a(20) =799931a(21) =1558224a(22) =3035341a(23) =5912689a(24) =11517614a(25) =22435718a(26) =43703622a(27) =85132404a(28) =165833537a(29) =323035186