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 A213707 #9 Jun 11 2025 19:02:25 %S A213707 0,2,5,8,12,16,21,26,32,38,45,52,60,68,76,84,93,102,112,122,133,144, %T A213707 155,166,178,190,202,214,227,240,253,266,280,294,309,324,340,356,372, %U A213707 388,405,422,439,456,474,492,510,528,547,566,585,604,624,644,664,684,705,726,747,768,790 %N A213707 Positions of zeros in A218254. %H A213707 Antti Karttunen, <a href="/A213707/b213707.txt">Table of n, a(n) for n = 0..720</a> %F A213707 a(n) = n+A213706(n). %o A213707 (Scheme) (define (A213707 n) (+ n (A213706 n))) %K A213707 nonn %O A213707 0,2 %A A213707 _Antti Karttunen_, Oct 24 2012