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 A090606 #9 Aug 04 2021 02:22:59 %S A090606 1,2,4,7,8,15,16,17,19,27,30,31,37,52,57,61,65,75,76,78,87,91,106,112, %T A090606 113,118,143,145,155,158,165,184,188,207,220,229,237,241,265,269,278, %U A090606 288,295,306,307,311,312,332,346,360,368,383,388,393,404,418,439,449 %N A090606 A089144 indexed by A000040. %C A090606 Prime(k)*6 - 3 -+ 2 are both prime. - _Juri-Stepan Gerasimov_, Mar 19 2010 %F A090606 a(n)=k such that A000040(k)=A089144(n). %Y A090606 Cf. A089144, A090607, A090608, A090609, A090610. %K A090606 nonn %O A090606 1,2 %A A090606 _Ray Chandler_, Dec 06 2003 %E A090606 Offset changed to 1 by _Jinyuan Wang_, Aug 03 2021