This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A175299 #11 Mar 11 2014 01:32:51 %S A175299 1,2,4,6,8,10,16,20,18,22,32,36,34,38,64,72,68,76,66,74,70,78,128,136, %T A175299 132,140,130,138,134,142,256,272,264,280,260,276,268,284,258,274,266, %U A175299 282,262,278,270,286,512,528,520,536,516,532,524,540,514,530,522 %N A175299 a(n) = the smallest positive integer such that A175298(a(n)) = the n-th positive integer that is a palindrome when written in binary. %F A175299 a(n) = 2^floor(log_2(P(n))) + P(n)(mod 2^(floor(log_2(P(n))/2)+1)) -1, where P(n) = the n-th positive integer that is a palindrome when written in binary. %Y A175299 Cf. A175298 %K A175299 base,nonn %O A175299 1,2 %A A175299 _Leroy Quet_, Mar 24 2010 %E A175299 More terms from _Nathaniel Johnston_, Nov 18 2010