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 A026192 #6 Jun 24 2025 13:08:08 %S A026192 1,4,2,8,3,12,14,5,6,20,7,24,26,9,10,32,11,36,38,13,42,44,15,16,50,17, %T A026192 18,56,19,60,62,21,22,68,23,72,74,25,78,80,27,28,86,29,30,92,31,96,98, %U A026192 33,34,104,35,108,110,37,114,116,39,40,122 %N A026192 (1/3)*s(n), where s(n) is the n-th multiple of 3 in A026142. %C A026192 Is this a duplicate of A026142? - _R. J. Mathar_, Jun 24 2025 %K A026192 nonn %O A026192 1,2 %A A026192 _Clark Kimberling_