L.g.f.: Sum_{n>=1} a(n)*x^n/n = log( Sum_{n>=0} x^(2^n-1) ).

Terms

a(0) =1a(1) =-1a(2) =4a(3) =-5a(4) =6a(5) =-10a(6) =22a(7) =-29a(8) =40a(9) =-66a(10) =100a(11) =-146a(12) =222a(13) =-344a(14) =534a(15) =-797a(16) =1208a(17) =-1846a(18) =2794a(19) =-4230a(20) =6430a(21) =-9780a(22) =14836a(23) =-22514a(24) =34206a(25) =-51936a(26) =78826a(27) =-119684a(28) =181744a(29) =-275940