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 A091578 #5 Jan 27 2019 21:20:09 %S A091578 2,7,3,11,5,19,13,23,17,37,29,41,31,53,43,59,47,71,61,73,67,89,79,97, %T A091578 83,107,101,109,103,131,113,137,127,151,139,157,149,173,163,179,167, %U A091578 193,181,197,191,223,199,227,211,239,229,241,233,263,251,257 %N A091578 Permutation of primes generated by 2-rowed array shown below. %C A091578 2 7 11 19 23 37 41 53 59 ... (A060191) %C A091578 3 5 13 17 29 31 43 47 61 ... (A060192) %F A091578 a(n) = A000040(A090964(n)). a(n) = A000040(a(k+8) = a(k)+8). %Y A091578 Cf. A090964. %K A091578 nonn %O A091578 1,1 %A A091578 _Giovanni Teofilatto_, Mar 05 2004; corrected and extended Oct 13 2006, Oct 15 2006