Inverse Euler transform of A000931.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =1a(5) =0a(6) =1a(7) =1a(8) =1a(9) =1a(10) =2a(11) =2a(12) =3a(13) =3a(14) =4a(15) =5a(16) =7a(17) =8a(18) =11a(19) =13a(20) =17a(21) =21a(22) =28a(23) =34a(24) =45a(25) =56a(26) =73a(27) =92a(28) =120a(29) =151