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 A087505 #21 Feb 04 2024 01:15:31 %S A087505 0,2,4,8,10,14,16,20,22,32,34,38,44,46,52,56,58,62,70,74,76,86,88,92, %T A087505 100,104,112,118,122,128,130,134,136,146,148,154,164,170,172,176,190, %U A087505 196,202,206,212,218,220,224,230,232,238,242,244,256,260,274,284,286 %N A087505 Numbers k such that 5*k+3 is a prime. %D A087505 M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988 %D A087505 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997 %H A087505 Daniel Starodubtsev, <a href="/A087505/b087505.txt">Table of n, a(n) for n = 1..10000</a> %e A087505 10 is a term as 5*10 + 3 = 53 is prime. - _David A. Corneth_, Nov 11 2019 %o A087505 (PARI) is(n) = isprime(5*n+3) \\ _David A. Corneth_, Nov 11 2019 %K A087505 nonn,easy %O A087505 1,2 %A A087505 _Giovanni Teofilatto_, Nov 04 2003 %E A087505 Corrected and extended by _Ray Chandler_, Nov 08 2003