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 A163184 #8 Mar 27 2017 21:34:35 %S A163184 281,617,1033,1049,1097,1193,1481,1553,1753,1777,2281,2393,2473,2657, %T A163184 2833,2857,3049,3529,3673,3833,4049,4153,4217,4273,4457,4937,5113, %U A163184 5297,5881,6121,6449,6481,6521,6529,6569,6761,6793,6841,7121,7129,7481,7577,7817,8081,8233,8537,9001,9137,9209,9241 %N A163184 Primes of the form 8k + 1 dividing 2^j + 1 for some odd j. %C A163184 Each term p has the form 2^r*j + 1, where r >= 3, j is odd, and ord_p(-2) divides j. %e A163184 281 is in the sequence as 281 = 2^3*35 + 1 and 281 | 2^35 + 1. %p A163184 with(numtheory):A:=NULL:p:=2: for c to 500 do p:=nextprime(p);if order(-2,p) mod 2=1 and p mod 8 = 1 then A:=A,p;;fi;od:A; %Y A163184 Set difference of A163183 and A007520. %Y A163184 Subsequence of A033203, A051071, A051073, A051077, A051085, A051101. %K A163184 easy,nonn %O A163184 1,1 %A A163184 _Christopher J. Smyth_, Jul 22 2009 %E A163184 More terms from _Max Alekseyev_, Sep 29 2016