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 A061155 #16 Jan 26 2023 10:03:36 %S A061155 31,91,353,493,512,587,692,752,829,919,1021,1024,1174,1384,1643,1658, %T A061155 1669,1735,1838,1913,1921,2042,2048,2057,2311,2423,2768,3167,3286, %U A061155 3316,3443,3826,3829,3842,3983,4037,4084,4096,4114,4429,4801,4846,4861,5536,6319,6334,6529 %N A061155 Numbers k such that k*2^m+1 is prime for exactly one exponent m in the range 0<=m<=k. %C A061155 Corresponding exponent values see A061156. %H A061155 Michael S. Branicky, <a href="/A061155/b061155.txt">Table of n, a(n) for n = 1..102</a> %Y A061155 Cf. A061153, A061154, A061156, A061157, A061158. %K A061155 nonn %O A061155 1,1 %A A061155 _Patrick De Geest_, Apr 15 2001 %E A061155 Offset corrected and a(29)-a(43) from _Sean A. Irvine_, Jan 24 2023 %E A061155 a(44) and beyond from _Michael S. Branicky_, Jan 25 2023