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%I #12 Sep 30 2023 12:16:28
%S 1,1,1,1,2,2,2,3,4,4,4,5,6,6,7,8,9,9,10,11,12,13,14,15,16,17,18,19,21,
%T 22,23,24,26,27,28,30,32,33,34,36,38,39,41,43,45,46,48,50,52,54,56,58,
%U 60,62,64,66,69,71,73,75
%N Expansion of 1/((1-x)(1-x^4)(1-x^7)).
%C Partitions into parts 1, 4, and 7. - _Joerg Arndt_, May 01 2014
%H <a href="/index/Rec#order_12">Index entries for linear recurrences with constant coefficients</a>, signature (1, 0, 0, 1, -1, 0, 1, -1, 0, 0, -1, 1).
%F a(n) = floor((n^2+12*n+50+14*cos(n*Pi/2))/56). - _Tani Akinari_, May 01 2014
%F a(n)= +a(n-1) +a(n-4) -a(n-5) +a(n-7) -a(n-8) -a(n-11) +a(n-12). - _R. J. Mathar_, Aug 21 2014
%K nonn,easy
%O 0,5
%A _N. J. A. Sloane_.