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 A050620 #14 Jun 17 2020 16:42:25 %S A050620 2,11,43,209,1042,6771,26823,130599,651237,3255306,21158903,83821639, %T A050620 408121757,2035115566,13224589033,52388661704,331370112102, %U A050620 1691563962301,6567827879588,41430886596044,211450306579272,1059399469695886,5298071316879193,20530429091056784 %N A050620 Quotients arising from sequence A035014. %H A050620 Ray Chandler, <a href="/A050620/b050620.txt">Table of n, a(n) for n = 1..1431</a> (terms < 10^1000, first 1000 terms from Alois P. Heinz) %F A050620 a(n) = a(n-1)/2 + 5^(n-1)*(4-[a(n-1) mod 2])/2. - Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Jun 17 2001 %F A050620 a(n) = A035014(n)/2^n. - _Michel Marcus_, Apr 07 2017 %o A050620 (PARI) a(n) = if (n==1, 2, a(n-1)/2 + 5^(n-1)*(4-(a(n-1) % 2))/2); %Y A050620 Cf. A023402, A035014. %K A050620 nonn,base %O A050620 1,1 %A A050620 _Patrick De Geest_, Jun 15 1999 %E A050620 More terms from Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Jun 17 2001 %E A050620 More terms from _Michel Marcus_, Apr 07 2017