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 A090092 #14 Feb 03 2020 03:14:17 %S A090092 25,25,49,49,121,25,25,49,49,49,25,25,121,121,49,25,25,49,121,169,25, %T A090092 25,49,49,49,25,25,121,49,49,25,25,169,121,121,25,25,49,49,121,25,25, %U A090092 49,49,49,25,25,121,121,49,25,25,49,169,169,25,25,49,49,49,25,25,121,49,49,25 %N A090092 a(n) is the smallest composite number coprime to n, n+1 and n+2. %F A090092 a(n) = A053671(n)^2. %t A090092 m=0;Table[fla=1;Do[s=GCD[n, k];s1=GCD[n, k+1]; s2=GCD[n, k+2];s3=GCD[n, k+3]; If[Equal[s, 1]&&Equal[s1, 1]&&Equal[s2, 1] &&!PrimeQ[n]&&!Equal[n, 1] &&Equal[fla, 1], m=m+1;Print[n];fla=0], {n, 1, 1000}], {k, 1, 256}] %t A090092 nn=200;With[{c=Complement[Range[2,nn],Prime[Range[PrimePi[nn]]]]}, Flatten[ Table[ Select[c,And@@Thread[CoprimeQ[{n,n+1,n+2},#]]&,1],{n,nn}]]](* _Harvey P. Dale_, Sep 28 2013 *) %Y A090092 Cf. A053669, A053670, A053671, A053672, A053673, A053674. %Y A090092 Cf. A090093, A090094, A090095. %K A090092 nonn %O A090092 1,1 %A A090092 _Labos Elemer_, Nov 26 2003