Search: id:A059776
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%I A059776
%S A059776 1,2,5,11,24,48,95,178,328,585,1025,1754,2958,4897,8002,12889,20523,
%T A059776 32289,50296,77550,118521,179553,269881,402532,596178,876942,1281777,
%U A059776 1862015,2689405,3862891,5519403,7846393,11100970,15632733,21917280
%N A059776 Three-quadrant Ferrers graphs that partition n.
%D A059776 G. E. Andrews, Three-quadrant Ferrers graphs, Indian J. Math., 42 (No. 
               1, 2000), 1-7.
%p A059776 t1 := add( (-1)^(j)*q^(j*(j+1)/2)*(1-q^(j+1))/(1-q),j=0..101); t3 := 
               mul((1-q^n)^3,n=1..101); series(t1/t3,q,101);
%Y A059776 Cf. A000041, A001522, A059777.
%Y A059776 Sequence in context: A067149 A091358 A091359 this_sequence A091360 A090764 
               A027934
%Y A059776 Adjacent sequences: A059773 A059774 A059775 this_sequence A059777 A059778 
               A059779
%K A059776 nonn,easy
%O A059776 0,2
%A A059776 N. J. A. Sloane (njas(AT)research.att.com), Feb 21 2001

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