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 A100031 #6 Jun 26 2025 11:14:57
%S A100031 2,5,23,41,83,113,173,191,239,281,359,431,491,593,653,683,743,809,953,
%T A100031 1019,1049,1223,1289,1439,1481,1511,1583,1733,1889,1931,2003,2063,
%U A100031 2129,2273,2351,2399,2543,2693,2741,2819,2939,2969,3299,3359,3413,3491,3593
%N A100031 Bisection of A005384.
%p A100031 A:={}: for n from 1 to 608 do if isprime(2*ithprime(n)+1)=true then A:=A union {ithprime(n)} else A:=A fi od: B:=convert(A, list): seq(B[2*j-1],j=1..nops(B)/2);
%Y A100031 Cf. A005384.
%K A100031 nonn,easy
%O A100031 0,1
%A A100031 _N. J. A. Sloane_, Nov 20 2004
%E A100031 More terms from _Emeric Deutsch_, Dec 09 2004