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 A183267 #11 May 12 2020 19:57:07 %S A183267 4760,199168,4643712,80506880,1163431808,14874150912,174293203968, %T A183267 1915121868800,20041282099200,201949448765440,1975285587312640, %U A183267 18866258297487360,176760773333450752,1630252849810636800,14841729785246515200,133664316735891701760,1192882240528106127360 %N A183267 Number of singly defective permutations of 1..n+6 with exactly 4 maxima. %C A183267 A singly defective permutation omits one value and repeats another value. %H A183267 Andrew Howroyd, <a href="/A183267/b183267.txt">Table of n, a(n) for n = 1..200</a> %e A183267 Some solutions for n=2 with 4 maxima: %e A183267 (7,5,3,6,1,5,2,8) (7,1,8,4,3,4,2,6) (6,3,7,2,8,3,5,4) (6,1,5,2,4,3,3,7). %Y A183267 Column 4 of A183270. %K A183267 nonn %O A183267 1,1 %A A183267 _R. H. Hardin_, Jan 03 2011 %E A183267 Terms a(10) and beyond from _Andrew Howroyd_, May 12 2020