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 A165478 #2 Mar 31 2012 13:21:19 %S A165478 0,131070,131071,262141,262142,393212,393213,524283,524284,655354, %T A165478 655355,786425,786426,917496,917497,1048567,1048568,1179638,1179639, %U A165478 1310709,1310710,1441780,1441781,1572851,1572852,1703922,1703923 %N A165478 Positions of zeros in A165477. %F A165478 a(n) = floor(n/2)*131071 + (n modulo 2)*131070 %o A165478 (MIT Scheme:) (define (A165478 n) (+ (* (floor->exact (/ n 2)) 131071) (* (modulo n 2) 131070))) %Y A165478 See also A165479. Compare also to A165473, A165483. %K A165478 nonn %O A165478 0,2 %A A165478 _Antti Karttunen_, Sep 21 2009