Distance from 2^n to the nearest triangular number.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =1a(5) =4a(6) =2a(7) =8a(8) =3a(9) =16a(10) =11a(11) =32a(12) =1a(13) =64a(14) =87a(15) =128a(16) =167a(17) =256a(18) =306a(19) =512a(20) =500a(21) =1024a(22) =552a(23) =2048a(24) =688a(25) =4096a(26) =3041a(27) =8192a(28) =579a(29) =16384