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 A277910 #7 Nov 07 2016 09:12:27 %S A277910 3,5,7,15,21,24,34,36,38,44,47,51,61,65,67,77,91,94,104,106,117,128, %T A277910 141,145,148,155,164,168,201,207,216,248,276,286,288,294,296,304,314, %U A277910 324,338,341,345,364,366,411,428,431,434,436,441,477,484,496,498,524,528,534,537,556,567,597,624,626,666,668,677,695,697,715,748,758 %N A277910 Numbers n for which A277911(n) = n-1. %H A277910 Antti Karttunen, <a href="/A277910/b277910.txt">Table of n, a(n) for n = 1..481</a> %F A277910 a(n) = 1 + A277909(n). %o A277910 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A277910 (define A277910 (MATCHING-POS 1 1 (lambda (n) (= (A277911 n) (- n 1))))) %Y A277910 Even bisection of A277908. %Y A277910 One more than A277909. %Y A277910 Cf. A277911. %K A277910 nonn %O A277910 1,1 %A A277910 _Antti Karttunen_, Nov 05 2016