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 A354164 #22 Nov 04 2023 12:48:13 %S A354164 1,5,7,11,14,15,23,29,31,32,47,59,60,63,65,95,96,119,120,121,127,128, %T A354164 131,132,191,193,239,241,243,244,255,257,263,264,265,383,387,388,479, %U A354164 480,483,484,487,488,489,511,512,515,527,529,531,571,767,775,776,777,959,960,961,967,968,969,975,976,977,979,980,1023,1031,1055,1056,1059,1063 %N A354164 Indices of nonprimes in A090252. %H A354164 Russ Cox, <a href="/A354164/b354164.txt">Table of n, a(n) for n = 1..3527</a> (first 374 terms from N. J. A. Sloane) %H A354164 Russ Cox, <a href="/A354164/a354164.txt">Table of nonprime entries in A090252: n, A090252(n), # of prime factors, n = 1..3527</a>. %H A354164 Hugo van der Sanden, <a href="/A354164/a354164_b.txt">Table of nonprime entries in the first 10^9 terms of A090252</a>. [See file header for description] %Y A354164 Cf. A090252, A354148, A354165, A354166. %K A354164 nonn %O A354164 1,2 %A A354164 _N. J. A. Sloane_, May 31 2022