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 A089033 #19 Jan 26 2023 12:12:09 %S A089033 0,2,4,8,10,14,22,28,32,34,38,40,44,50,52,58,68,74,80,82,88,92,94,110, %T A089033 112,118,122,134,140,142,148,158,160,164,170,178,182,184,188,194,208, %U A089033 212,220,224,230,232,238,242,250,260,268,272,278,298,304,320,334,340 %N A089033 Numbers n such that 7*n+3 is prime. %D A089033 M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988. %D A089033 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997. %H A089033 Daniel Starodubtsev, <a href="/A089033/b089033.txt">Table of n, a(n) for n = 1..10000</a> %F A089033 a(n) = A024903(n)-1 = A033868(n)-2 = A090614(n)*2. %t A089033 Select[Range[1000],PrimeQ[7#+3]&] %o A089033 (PARI) is(n)=isprime(7*n+3) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A089033 A045437 gives primes, A090613 gives prime index. %Y A089033 Cf. A024903, A033868, A090614. %K A089033 easy,nonn %O A089033 1,2 %A A089033 _Giovanni Teofilatto_, Nov 12 2003 %E A089033 Corrected and extended by _Ray Chandler_, Nov 12 2003 %E A089033 Offset corrected by _Arkadiusz Wesolowski_, Aug 09 2011