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 A094097 #20 Oct 11 2020 22:32:02
%S A094097 1,1,1,1,1,1,1,5,4,3,2,8,4,6,47,44,6,37,6,166,462,232,372,2130,1589,
%T A094097 9093,20896,20314,4118,32367,12815,167796,130528,59173,1942045,
%U A094097 2607312,163775,1297794,18340336,22304602,5065878,21005347,3607762,129164605
%N A094097 Number of divisor chains of length n which begin with n ("anchored" divisor chains).
%C A094097 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.
%e A094097 Examples of divisor chains of lengths 1 through 8:
%e A094097 1
%e A094097 2 1
%e A094097 3 1 2
%e A094097 4 2 3 1
%e A094097 5 1 2 4 3
%e A094097 6 2 4 3 5 1
%e A094097 7 1 2 5 3 6 4
%e A094097 8 2 5 3 6 4 7 1
%Y A094097 Cf. A067957, A094098, A094099.
%Y A094097 Right diagonal of A093323.
%K A094097 nonn
%O A094097 1,8
%A A094097 _N. J. A. Sloane_, following a suggestion of _R. K. Guy_, May 04 2004
%E A094097 a(1)-a(9) from _R. K. Guy_ and Paul Vaderlind
%E A094097 a(10)-a(19) from Ed Clark, Jr. and Chuck Seggelin
%E A094097 a(20)-a(28) from _Christopher Landauer_, May 04 2004
%E A094097 a(29)-a(37) from _Joseph Myers_, May 04 2004
%E A094097 a(38) from _Jud McCranie_, May 07 2004
%E A094097 a(39)-a(44) from _Joseph Myers_, May 21 2004