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 A345989 #12 Jul 13 2021 13:40:18 %S A345989 1,4,84,4,10,84,35,56,2925,10,165,84,286,56,120,560,680,3276,969,20, %T A345989 84,220,1771,120,2300,286,85320,56,3654,120,4495,4960,165,680,35,3276, %U A345989 7770,1140,2925,120,10660,84,12341,220,2925,2024,16215,816,18424,2300,816,364,23426,85320,165,56,969,3654,32509 %N A345989 Smallest tetrahedral number m*(m+1)*(m+2)/6 that is divisible by n. %C A345989 Equals m*(m+1)*(m+2)/6 where m = A265647(n). %Y A345989 Cf. A000292, A011772, A265647, A344005. %K A345989 nonn %O A345989 1,2 %A A345989 _N. J. A. Sloane_, Jul 13 2021