Search: id:A038315
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%I A038315
%S A038315 1,11,1,121,22,1,1331,363,33,1,14641,5324,726,44,1,161051,73205,
%T A038315 13310,1210,55,1,1771561,966306,219615,26620,1815,66,1,19487171,
%U A038315 12400927,3382071,512435,46585,2541,77,1,214358881,155897368,49603708
%N A038315 Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*1^j.
%C A038315 T(i,j) is the number of i-permutations of 12 objects a,b,c,d,e,f,g,h,
               i,j,k,l, with repetition allowed, containing j a's. - Zerinvary Lajos 
               (zerinvarylajos(AT)yahoo.com), Dec 21 2007
%D A038315 B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal 
               systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 
               109-121.
%e A038315 1
%e A038315 11, 1
%e A038315 121, 22, 1
%e A038315 1331, 363, 33, 1
%e A038315 14641, 5324, 726, 44, 1
%e A038315 161051, 73205, 13310, 1210, 55, 1
%e A038315 1771561, 966306, 219615, 26620, 1815, 66, 1
%e A038315 19487171, 12400927, 3382071, 512435, 46585, 2541, 77, 1
%e A038315 214358881, 155897368, 49603708, 9018856, 1024870, 74536, 3388, 88, 1
%p A038315 for i from 0 to 8 do seq(binomial(i, j)*11^(i-j), j = 0 .. i) od; - Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Dec 21 2007
%Y A038315 Sequence in context: A130556 A120449 A101623 this_sequence A093158 A132098 
               A160480
%Y A038315 Adjacent sequences: A038312 A038313 A038314 this_sequence A038316 A038317 
               A038318
%K A038315 nonn,tabl,easy
%O A038315 0,2
%A A038315 N. J. A. Sloane (njas(AT)research.att.com).

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