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 A160007 #12 Jun 14 2022 14:47:01
%S A160007 7,13,19,21,25,29,31,37,41,43,49,55,57,61,67,71,73,79,81,85,89,91,97,
%T A160007 101,103,105,109,113,115,121,127,133,139,141,145,151,157,161,163,169,
%U A160007 175,177,181,187,193,197,199,201,205,209,211,217,221,223,225,229,235
%N A160007 Deficient numbers more than 1 unit away from their predecessors.
%H A160007 Rainer Rosenthal, <a href="/A160007/b160007.txt">Table of n, a(n) for n = 1..2488</a>
%e A160007 The first dozen deficient numbers are 1,2,3,4,5,7,8,9,10,11,13,14. There are "jumps" between a(5) and a(6), and between a(10) and a(11), i.e., at 7 and 13.
%o A160007 (PARI) lista(nn) = {last = 0; for (i = 1, nn, if (sigma(i) < 2*i, if (i > last + 1, print1(i, ", ");); last = i;););} \\ _Michel Marcus_, Sep 02 2013
%Y A160007 Cf. A005100 (deficient numbers).
%Y A160007 Cf. A353448.
%K A160007 nonn
%O A160007 1,1
%A A160007 Don Love (moptop35(AT)hotmail.com), Apr 29 2009
%E A160007 More terms from Don Love (moptop35(AT)hotmail.com), May 01 2009