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 A046861 #12 Apr 29 2021 20:10:27 %S A046861 1,7,11,31,41,49,109,127,139,143,151,173,179,203,217,397,491,511,521, %T A046861 539,547,589,599,683,749,803,929,989,2041,2047,2107,2153,2191,2219, %U A046861 2531,2693,2723,2761,2999,3661,3721,3739,6199,6923,7949 %N A046861 Lower members of a "good pair" of the form (k, 2*k +- 1). %H A046861 N. G. de Bruijn, <a href="http://dx.doi.org/10.1090/S0025-5718-1964-0167447-9">Some direct decompositions of the set of integers</a>, Math. Comp., 18 (1964), 537-546. %H A046861 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a046/A046861.java">Java program</a> (github) %Y A046861 Cf. A046862, A000696. %K A046861 nonn,easy,nice %O A046861 1,2 %A A046861 _N. J. A. Sloane_ %E A046861 Reference gives 45 terms. %E A046861 More terms from Pab Ter (pabrlos2(AT)yahoo.com), Nov 06 2005 %E A046861 Offset corrected and title improved by _Sean A. Irvine_, Apr 29 2021