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 A079975 #15 Apr 16 2024 04:17:45
%S A079975 1,1,2,4,7,14,26,49,93,175,331,625,1180,2229,4209,7949,15012,28350,
%T A079975 53540,101111,190950,360613,681024,1286127,2428875,4586976,8662591,
%U A079975 16359466,30895160,58346092,110187694,208091537,392984789,742159180
%N A079975 Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=4, I={3}.
%C A079975 Number of compositions (ordered partitions) of n into elements of the set {1,2,3,5}.
%D A079975 D. H. Lehmer, Permutations with strongly restricted displacements. Combinatorial theory and its applications, II (Proc. Colloq., Balatonfured, 1969), pp. 755-770. North-Holland, Amsterdam, 1970.
%H A079975 Vladimir Baltic, <a href="http://pefmath.etf.rs/vol4num1/AADM-Vol4-No1-119-135.pdf">On the number of certain types of strongly restricted permutations</a>, Applicable Analysis and Discrete Mathematics Vol. 4, No 1 (2010), 119-135.
%H A079975 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (1,1,1,0,1).
%F A079975 Recurrence: a(n) = a(n-1)+a(n-2)+a(n-3)+a(n-5).
%F A079975 G.f.: -1/(x^5+x^3+x^2+x-1).
%Y A079975 Cf. A002524-A002529, A072827, A072850-A072856, A079955-A080014.
%K A079975 nonn,easy
%O A079975 0,3
%A A079975 _Vladimir Baltic_, Feb 17 2003