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 A076812 #9 Oct 19 2017 03:14:07 %S A076812 11,17,23,31,47,59,71,79,97,127,127,151,167,179,191,223,239,251,271, %T A076812 307,311,347,337,359,401,409,419,431,439,457,521,541,571,563,599,607, %U A076812 631,659,673,709,719,727,769,809,811,809,857,911,911,919,937,967,967 %N A076812 a(n) = the smallest prime p such that p-prime(n)*4 is prime. %D A076812 Hans Rademacher, Lectures on Elementary Number Theory, 1964: Primes in an arithmetic progression - Proof of Dirichlet's Theorem. pp. 121-136. %Y A076812 Cf. A000040, A073703, A073704. %K A076812 easy,nonn %O A076812 1,1 %A A076812 _Cino Hilliard_, Nov 19 2002 %E A076812 Edited by _Don Reble_, May 03 2006