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 A296345 #7 Dec 17 2017 10:17:58 %S A296345 0,1,5,3,9,8,10,18,19,13,15,16,17,22,25,37,29,30,34,31,36,50,39,38,41, %T A296345 46,44,47,51,53,54,56,59,57,61,65,62,82,68,72,69,70,74,73,101,80,78, %U A296345 83,85,87,91,94,97,125,100,103,104,116,105,111,112,110,107,109 %N A296345 Numbers in cells in spiral A274820 on spoke through center with slope 120 degrees. %C A296345 It is conjectured that this and A296348 together are a permutation of the nonnegative numbers. %H A296345 Rémy Sigrist, <a href="/A296345/b296345.txt">Table of n, a(n) for n = 0..2500</a> %H A296345 Rémy Sigrist, <a href="/A296345/a296345.gp.txt">PARI program for A296345</a> %o A296345 (PARI) See Links section. %Y A296345 Cf. A274820, A296343, A296344, A296346, A296347, A296348. %K A296345 nonn %O A296345 0,3 %A A296345 _N. J. A. Sloane_, Dec 16 2017 %E A296345 More terms from _Rémy Sigrist_, Dec 17 2017