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 A173232 #11 May 15 2020 04:39:47 %S A173232 1,3,5,10,23,30,38,45,70,135,170,175,213,215,268,355,465,560,588,653, %T A173232 703,705,710,773,798,835,940,978,1115,1130,1158,1258,1370,1500,1570, %U A173232 1843,1860,2040,2280,2285,2333,2425,2985,3008,3020,3598,3600,3838,4375,4450,4480 %N A173232 Numbers k such that k and k+2 are both members of A002822. %e A173232 a(1)=1 because 1 and 3 are both in A002822. %o A173232 (PARI) isokp(n) = isprime(6*n-1) && isprime(6*n+1); %o A173232 isok(k) = isokp(k) && isokp(k+2); \\ _Michel Marcus_, May 15 2020 %Y A173232 Cf. A002822, A173233. %K A173232 nonn %O A173232 1,2 %A A173232 _Juri-Stepan Gerasimov_, Feb 13 2010 %E A173232 Definition corrected, and sequence corrected (1158 inserted) by _R. J. Mathar_, May 02 2010 %E A173232 More terms from _Jinyuan Wang_, May 15 2020