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 A183268 #7 May 12 2020 19:57:15 %S A183268 249984,14548480,469942528,11190054912,219921448448,3786548183040, %T A183268 59211819110400,861044410941440,11836043861688320,155624676666900480, %U A183268 1974466952368095232,24334201908725022720,292836028257957445632,3454921061964353372160,40092721917664469975040 %N A183268 Number of singly defective permutations of 1..n+8 with exactly 5 maxima. %C A183268 A singly defective permutation omits one value and repeats another value. %H A183268 Andrew Howroyd, <a href="/A183268/b183268.txt">Table of n, a(n) for n = 1..200</a> %e A183268 Some solutions for n=2 with 5 maxima: %e A183268 (6,1,2,9,7,9,4,10,5,8) (6,1,5,3,10,9,4,8,2,4) (6,1,3,2,10,4,9,3,5,7). %Y A183268 Column 5 of A183270. %K A183268 nonn %O A183268 1,1 %A A183268 _R. H. Hardin_, Jan 03 2011 %E A183268 Terms a(8) and beyond from _Andrew Howroyd_, May 12 2020