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 A240132 #17 Mar 01 2019 04:46:07
%S A240132 0,0,0,0,5,379118
%N A240132 Number of solutions of 1/x_1 + 1/x_2 + ... + 1/x_{2n-1} = 1 in distinct odd numbers > 1.
%C A240132 The next term is a(7) > 467871307.
%H A240132 R. Arce-Nazario, F. Castro, and R. Figueroa, <a href="https://doi.org/10.1016/j.jnt.2012.11.011">On the number of solutions of Sum_{i = 1..11} 1/x_i = 1 in distinct odd natural numbers</a>, J. Number Theory, 133 (2013), 2036-2046.
%H A240132 C. Elsholtz, <a href="http://zbmath.org/?q=an:1270.11033">Review of ``On the number of solutions of sum_{i = 1..11} 1/x_i = 1 in distinct odd natural numbers'' by R. Arce-Nazario, F. Castro, and R. Figueroa</a>, zbMATH 1270.11033.
%e A240132 If 1 < x_1 < x_2 < x_3 are odd, then 1/x_1 + 1/x_2 + 1/x_3 < 3/3 = 1, so a(2) = 0.
%Y A240132 The five sets of 9 odd numbers are: A201644, A201646, A201647, A201648, A201649.
%Y A240132 See A238795 and A239036 for specific sets of 11 odd numbers.
%K A240132 hard,more,nonn
%O A240132 1,5
%A A240132 _Jonathan Sondow_, Apr 21 2014