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 A076175 #7 Mar 23 2025 16:14:11
%S A076175 1,1,1,2,3,12,15,30,21,168,126,1260,990,792,1287,18018,5005,80080,
%T A076175 68068,58344,50388,201552,176358,3879876,3432198,27457584,24515700,
%U A076175 637408200,573667380,16062686640,29113619535,26466926850,24131609775
%N A076175 Denominator of Sum_{i+j+k=n, i,j,k>=1} (i*j)/k.
%o A076175 (PARI) a(n)=denominator(sum(i=1,n,sum(j=1,n,sum(k=1,n,if(n-i-j-k,0,1)*i*j/k))))
%Y A076175 Cf. A076174.
%K A076175 frac,nonn
%O A076175 1,4
%A A076175 _Benoit Cloitre_, Nov 01 2002