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 A083990 #5 Dec 05 2013 19:56:15 %S A083990 37,73,1783,2377,2971,3169,4159,4357,5347,6733,7129,8317,109891, %T A083990 127873,139861,151849,173827,179821,197803,211789,229771,263737, %U A083990 271729,281719,307693,359641,463537,547453,557443,569431,587413,593407,673327,677323 %N A083990 Primes arising in A083989. %e A083990 4357 is the term corresponding to 43. %Y A083990 Cf. A083989, A083991. %K A083990 base,nonn %O A083990 1,1 %A A083990 _Amarnath Murthy_, May 23 2003 %E A083990 More terms from _Sam Alexander_, Feb 27 2005