%I #21 Mar 07 2024 20:08:51
%S 2,9,9,49,49,423,423,423,423,1333,1333,4425,4425,4425,4425,8763,8763,
%T 14089,14089,22825,22825,22825,22825,40291,40291,40291,40291,40291,
%U 40291,178705,178705,661285,661285,661285,661285,4543141,4543141,4543141,4543141,4543141,4543141,4543141,4543141,4543141,4543141,4543141,4543141
%N a(n) is the minimum positive integer j such that [j, j+n-1] does not contain any values of sigma(k) (i.e., sum of all positive divisors of k).
%H Donovan Johnson, <a href="/A109322/b109322.txt">Table of n, a(n) for n = 1..85</a> (terms < 10^10)
%H Art of Problem Solving, <a href="http://www.artofproblemsolving.com/Forum/viewtopic.php?t=26906">Gaps in {sigma(n)}...</a>
%Y Cf. A002191, A083531, A109323, A109324, A110875.
%K nonn
%O 1,1
%A _Max Alekseyev_ and _Jud McCranie_, Aug 08 2005