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 A074367 #8 Jan 15 2019 14:26:09 %S A074367 1,5,11,29,41,71,89,131,209,239,341,419,461,551,701,869,929,1121,1259, %T A074367 1331,1559,1721,1979,2351,2549,2651,2861,2969,3191,4031,4289,4691, %U A074367 4829,5549,5699,6161,6641,6971,7481,8009,8189,9119,9311,9701,9899,11129 %N A074367 (p^2-5)/4 for odd primes p. %t A074367 a[n_] := (Prime[n+1]^2-5)/4 %t A074367 (#^2-5)/4&/@Prime[Range[2,50]] (* _Harvey P. Dale_, Jan 15 2019 *) %Y A074367 a(n) = A024701(n)-1. %K A074367 nonn,easy %O A074367 1,2 %A A074367 _Roger L. Bagula_, Sep 23 2002 %E A074367 Edited by _Dean Hickerson_, Oct 09 2002