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 A222464 #7 Nov 17 2022 18:10:03 %S A222464 1,13,7,5,4,17,1,19,5,7,11,23,2,25,13,3,7,29,5,31,8,11,17,35,1,37,19, %T A222464 13,10,41,7,43,11,5,23,47,4,49,25,17,13,53,3,55,14,19,29,59,5,61,31,7, %U A222464 16,65,11,67,17,23,35,71,2,73,37,25,19,77,13,79,20,9,41 %N A222464 a(n) = (n+6)/gcd(n*6,n+6), n >= 6. %C A222464 This is the sixth column (m=6) of the triangle A221919. %F A222464 a(n) = A221919(n,6) = denominator(n*6/(n+6)) = numerator(n+6/n*6) = (n+6)/gcd(n*6,n+6) = (n+6)/gcd(36,n+6), n >= 6. %e A222464 a(10) = numerator(16/60) = numerator(4/15) = 4 = 16/gcd(60,16) = 16/gcd(36,16). %Y A222464 Cf. A221919, A000027(n+1) (m=1), A060819(n+2) (m=2), A106610(n+3) (m=3), A106617(n+4) (m=4), A132739(n+5) (m=5). %K A222464 nonn,easy %O A222464 6,2 %A A222464 _Wolfdieter Lang_, Feb 21 2013