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%I #13 Feb 12 2019 10:40:50
%S 0,0,0,0,2,6,17,42,97,212,446,910,1813,3542,6809,12912,24202,44910,
%T 82609,150786,273353,492532,882598,1573766,2793605,4938670,8698129,
%U 15266688,26710610,46595766,81063473,140670426,243530641,420673076,725165006,1247627998,2142593365,3673217414,6287062121
%N G.f.: x^4*(2 - x^2 + x^3 + x^4)/(1-x-x^2)^3.
%H S. Kitaev and J. Remmel, <a href="http://arxiv.org/abs/1305.6970">The 1-box pattern on pattern avoiding permutations</a>, arXiv preprint arXiv:1305.6970 [math.CO], 2013. See Th. 7.
%H <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (3,0,-5,0,3,1).
%t Join[{0, 0, 0}, LinearRecurrence[{3, 0, -5, 0, 3, 1}, {0, 2, 6, 17, 42, 97}, 36]] (* _Jean-François Alcover_, Feb 12 2019 *)
%K nonn
%O 0,5
%A _N. J. A. Sloane_, Oct 01 2013
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