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 A276839 #5 Sep 20 2016 18:53:34 %S A276839 1,1,2,6,24,120,360,1050,3192,10305,35505,116620,374172,1195764, %T A276839 3848248,12538476,40807108,132283092,427799593,1383464353,4481902342, %U A276839 14529001194,47085299068,152520137944,493941015012,1599895591174,5182983937428,16791233651977 %N A276839 Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most five elements. %H A276839 Alois P. Heinz, <a href="/A276839/b276839.txt">Table of n, a(n) for n = 0..1000</a> %F A276839 G.f.: -(x^8 +x^6 +5*x^5 +3*x^3 +x^2 -1) / (x^16 +7*x^15 +6*x^14 -3*x^13 +53*x^12 +138*x^11 +97*x^10 +95*x^9 +24*x^8 -61*x^7 -75*x^6 -70*x^5 -9*x^4 -5*x^3 -2*x^2 -x +1). %Y A276839 Column k=5 of A276837. %Y A276839 Cf. A276721. %K A276839 nonn,easy %O A276839 0,3 %A A276839 _Alois P. Heinz_, Sep 20 2016