Expansion of x * (d/dx) 1/(1 - Sum_{k>=1} x^k/(1 + x^k)).

Terms

a(0) =0a(1) =1a(2) =2a(3) =9a(4) =16a(5) =35a(6) =84a(7) =161a(8) =312a(9) =639a(10) =1240a(11) =2354a(12) =4536a(13) =8593a(14) =16128a(15) =30360a(16) =56672a(17) =105213a(18) =195174a(19) =360582a(20) =664040a(21) =1220730a(22) =2238324a(23) =4095035a(24) =7479552a(25) =13636750a(26) =24821108a(27) =45114813a(28) =81887008a(29) =148438211