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 A316852 #11 Jul 27 2018 17:01:44 %S A316852 3,5,7,7,8,9,10,9,11,11,11,12,13,11,12,13,14,13,13,14,15,16,13,17,15, %T A316852 15,16,17,15,16,17,18,19,15,16,17,18,19,20,17,18,17,19,17,18,19,20,21, %U A316852 22,17,19,21,23,19,19,20,19,20,21,22,23,19,20,21,22,23,24 %N A316852 Consider primitive integer triangles as listed in rows of table A316842. Sequence gives perimeters of these triangles in the same order. %C A316852 The only missing numbers are 1,2,4,6. %H A316852 Lars Blomberg, <a href="/A316852/b316852.txt">Table of n, a(n) for n = 1..3000</a> %Y A316852 Cf. A316841, A316842, A316851. %Y A316852 a(n) = A316846(n)+A316847(n)+A316848(n). %K A316852 nonn %O A316852 1,1 %A A316852 _N. J. A. Sloane_, Jul 23 2018 %E A316852 Terms a(54) and beyond from _Lars Blomberg_, Jul 27 2018