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 A102858 #7 Jun 05 2025 07:32:03 %S A102858 0,1,4,5,10,11,14,15,20,21,24,25,30,31,34,35,36,39,40,45,46,49,50,55, %T A102858 56,57,59,60,61,65,66,67,69,70,71,76,77,80,81,84,85,86,87,88,89,90,91, %U A102858 92,94,95,96,98,99,101,102,104,105,108,109,111,112,114,115,118 %N A102858 Sum of 1, 2, or 4 distinct tetrahedral numbers. %Y A102858 Cf. A104246, A102795-A102806, A102855, A102857. %Y A102858 Cf. A102856 (subsequence). %K A102858 nonn %O A102858 1,3 %A A102858 _Jud McCranie_, Mar 01 2005 %E A102858 a(1)=0 prepended. - _R. J. Mathar_, Jun 05 2025