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 A102801 #11 Jun 05 2025 08:23:13 %S A102801 5,11,14,21,24,30,36,39,45,55,57,60,66,76,85,88,91,94,104,119,121,124, %T A102801 130,140,155,166,169,175,176,185,200,204,221,224,230,240,249,255,276, %U A102801 285,287,290,296,304,306,321,340,342,365,368,370,374,384 %N A102801 Let f(n) be the minimal number of distinct nonzero tetrahedral numbers that add to n (or -1 if n is not a sum of distinct tetrahedral numbers); sequence gives numbers n for which f(n) = 2. %H A102801 R. J. Mathar, <a href="/A102801/b102801.txt">Table of n, a(n) for n = 1..966</a> %e A102801 680 (of A034404) is a sum of two distinct positive tetrahedral numbers but not in the list because it is also a tetrahedral number itself. - _R. J. Mathar_, Jun 05 2025 %Y A102801 Cf. A000292, A104246, A102795, etc. %K A102801 nonn %O A102801 1,1 %A A102801 _Jud McCranie_, Feb 26 2005