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 A132996 #15 Mar 12 2025 09:40:04
%S A132996 4,2,6,27,1,1,63,6,2,112,12,9,175,1,224,250,1,5,5,1,400,14,7,5,3,6,2,
%T A132996 8,12,3,17,847,896,22,1,1,1,6,2,1,3,3,1,2,6,31,1,1,26,4,28,2,1,1,10,
%U A132996 2368,2448,9,7,2695,20,2,1,1,31,18,2,1,9,3596,52,10,1,1,1,5,4300,2,74,4624
%N A132996 a(n) = gcd(Sum_{k=1..n} c(k), Product_{j=1..n} c(j)), where c(k) is the k-th composite.
%e A132996 The first 8 composites are 4,6,8,9,10,12,14,15. 4+6+8+9+10+12+14+15 = 78 = 2*3*13. So a(8) = gcd(2*3*13, 4*6*8*9*10*12*14*15) = 6.
%t A132996 lim=80;c[n_]:=n-PrimePi[n]-1;i=0;Do[Until[c[i]==m,i++];Cmp[m]=i,{m,lim}];Table[GCD[Sum[Cmp[k],{k,n}],Product[Cmp[j],{j,n}]],{n,lim}] (* _James C. McMahon_, Mar 09 2025 *)
%Y A132996 Cf. A053767, A036691.
%K A132996 nonn
%O A132996 1,1
%A A132996 _Leroy Quet_, Nov 22 2007
%E A132996 More terms from _R. J. Mathar_, Jan 13 2008