Expansion of Sum_{k>=0} (x^3 / (1 - k*x))^k.

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =2a(7) =5a(8) =13a(9) =34a(10) =90a(11) =247a(12) =720a(13) =2256a(14) =7568a(15) =26814a(16) =98982a(17) =377541a(18) =1484254a(19) =6021789a(20) =25271173a(21) =109850447a(22) =494355359a(23) =2298362532a(24) =11008133629a(25) =54175202125a(26) =273460921605