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 A282903 #6 Feb 24 2017 17:56:49
%S A282903 1,1,2,1,2,1,3,1,3,1,2,4,1,2,1,4,2,4,1,2,4,1,5,1,5,1,2,3,6,1,2,1,3,1,
%T A282903 6,2,3,2,6,3,6,1,2,3,1,2,6,1,3,6,2,3,6,1,2,3,6,1,7,1,7,1,2,4,8,1,2,1,
%U A282903 4,1,8,2,4,2,8,4,8,1,2,4,1,2,8,1,4,8,2
%N A282903 Concatenation of elements of P{d_1}, P{d_2}, P{d_3}, ..., P{d_n}; where P{d_n} denote the power set of the set of divisors of n ordered by the size of the subsets, and in each subset, following the increasing order.
%e A282903 Rows with power sets of divisors of n (without nonempty sets):
%e A282903 {1};
%e A282903 {1}, {2}, {1, 2};
%e A282903 {1}, {3}, {1, 3};
%e A282903 {1}, {2}, {4}, {1, 2}, {1, 4}, {2, 4}, {1, 2, 4};
%e A282903 {1}, {5}, {1, 5};
%e A282903 ...
%e A282903 Concatenation: 1, 1, 2, 1, 2, 1, 3, 1, 3, ...
%Y A282903 Cf. A193360 (concatenation of P{1..n}).
%K A282903 nonn
%O A282903 1,3
%A A282903 _Jaroslav Krizek_, Feb 24 2017