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 A288172 #16 Jun 20 2017 23:20:12 %S A288172 83,311,55813,42161,42161,714295,113469,5539053,20919,1439643,7134703, %T A288172 13432571,3337639,6082489,25241217,25241217,2389687,54309171,4142423, %U A288172 63388405,21570897,15843991,62196365,233917295,11679841,96905683,229821375,460000131,125571943 %N A288172 a(n) = smallest number that is the sum of 2n - 1, 2n + 1, and 2n + 3 consecutive primes. %e A288172 n=1: 83 = A000040(23) = A034961(9) = A034964(5) = 23+29+31 = 11+13+17+19+23. %e A288172 n=20: 63388405 is the sum of 39, 41 and 43 consecutive primes, A000040(122889)+...+A000040(122889+38) = A000040(117360)+...+A000040(122889+40) = A000040(112314)+...+A000040(112314+42). %Y A288172 Cf. A213174. %K A288172 nonn %O A288172 1,1 %A A288172 _Zak Seidov_, Jun 06 2017 %E A288172 More terms from _Giovanni Resta_, Jun 13 2017