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 A368076 #11 Feb 16 2025 08:34:06 %S A368076 3,36,2180,10053736 %N A368076 a(n) is the least integer that can be expressed as the difference of two positive tetrahedral numbers in exactly n ways. %C A368076 Index of first occurrence of n in A368072. %H A368076 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TetrahedralNumber.html">Tetrahedral Number</a> %e A368076 a(2) = 36: 36 = 56 - 20 = 120 - 84. %Y A368076 Cf. A000292, A136108, A334007, A368072. %K A368076 nonn,hard,more %O A368076 1,1 %A A368076 _Ilya Gutkovskiy_, Dec 10 2023