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 A118481 #10 Feb 05 2018 22:04:18 %S A118481 29,67,89,181,293,811,919,1153,1801,2017,2053,2113,2647,3373,3469, %T A118481 3583,4057,5153,5581,6481,6553,7727,8209,8447,8467,8543,8867,9887, %U A118481 10009,10477,11027,11743,12601,13249,13421,13729,13789,15017,15391,17011,17123,18919 %N A118481 Primes for which the level is equal to 9 in A117563. %H A118481 Remi Eismann, <a href="/A118481/b118481.txt">Table of n, a(n) for n=1..10000</a> %e A118481 Prime(310) has level 9: prime(311) = prime(310)+prime(310) mod(227) = prime(310)+prime(310) mod(2043) = 2063 %Y A118481 Cf. A117563, A117873, A117078, A117874, A006562, A117876, A001359, A118464. %K A118481 nonn %O A118481 1,1 %A A118481 _Rémi Eismann_, May 05 2006 %E A118481 Edited by _N. J. A. Sloane_, May 14 2006 %E A118481 Term a(19) and beyond from b-file by _Andrew Howroyd_, Feb 05 2018