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 A094099 #12 Jul 18 2025 10:15:00 %S A094099 1,1,1,1,4,2,4,47,6,6,462,372,1589,20896,4118,12815,130528,1942045, %T A094099 163775,18340336,5065878,3607762 %N A094099 Number of divisor chains of length 2n+1 which are both cyclic and anchored. %C A094099 A divisor chain of length n is an arrangement of 1..n such that each term is a divisor of the sum of the preceding terms. %F A094099 a(n) = A094097(2n+1). - _Martin Fuller_, Jul 18 2025 %Y A094099 Cf. A067957, A094097, A094098, A094099. %K A094099 nonn,more %O A094099 0,5 %A A094099 _Christopher Landauer_, May 04 2004 %E A094099 a(14)-a(21) from A094097 by _Martin Fuller_, Jul 18 2025