First differences of A006899.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =1a(5) =7a(6) =11a(7) =5a(8) =32a(9) =17a(10) =47a(11) =115a(12) =13a(13) =256a(14) =217a(15) =295a(16) =1024a(17) =139a(18) =1909a(19) =2465a(20) =1631a(21) =8192a(22) =3299a(23) =13085a(24) =26281a(25) =6487a(26) =65536a(27) =46075a(28) =84997a(29) =262144