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 A145091 #16 Jul 16 2025 11:46:21 %S A145091 0,2,3,0,5,0,7,0,0,0,0,0,13,0,0,0,0,0,19,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A145091 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %U A145091 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 %N A145091 a(n) = n if n is a term of A301776, otherwise a(n) = 0. %H A145091 Y. K. Huen, <a href="https://doi.org/10.1080/0020739940250616">A matrix map for prime and non-prime numbers</a>, International Journal Of Mathematics, Education, Science and Technolology Vol. 6: pages 913-920, 1994. %Y A145091 Cf. A301776. %K A145091 nonn,less %O A145091 1,2 %A A145091 Huen Yeong Kong (cosmology(AT)pacific.net.sg), Oct 01 2008 %E A145091 Edited and corrected by _Joerg Arndt_, Dec 27 2018