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 A130178 #6 Oct 30 2018 10:31:02 %S A130178 6,15,21,45,105,120,231,300,351,465,741,780,861,1176,1431,1485,3081, %T A130178 3240,3321,3828,4005,4278,5460,6786,6903,7140,7381,7503,7875,8001, %U A130178 10731,11175,11325,11781,12246,12561,13530,13695,14535,14706,17205,17391 %N A130178 Triangular numbers which are the average of two consecutive primes. %C A130178 Intersection of A000217 (triangular numbers) and A024675 (average of two consecutive primes). %H A130178 Zak Seidov, <a href="/A130178/b130178.txt">Table of n, a(n) for n = 1..1000</a> %e A130178 6-/+1, 15-/+2,..., 300-/+7 are pairs of consecutive primes. %Y A130178 Cf. A000217, A024675. %K A130178 nonn %O A130178 1,1 %A A130178 _Zak Seidov_, May 14 2007