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Search: id:A038327
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%I A038327
%S A038327 1,12,1,144,24,1,1728,432,36,1,20736,6912,864,48,1,248832,103680,
%T A038327 17280,1440,60,1,2985984,1492992,311040,34560,2160,72,1,35831808,
%U A038327 20901888,5225472,725760,60480,3024,84,1,429981696,286654464,83607552
%N A038327 Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*1^j.
%C A038327 T(i,j) is the number of i-permutations of 13 objects a,b,c,d,e,f,g,h,
               i,j,k,l,m, with repetition allowed, containing j a's. - Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Dec 21 2007
%C A038327 These are the rows of A013619 read right to left. Row sums are A001022(i). 
               - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 05 2008
%D A038327 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 A038327 1
%e A038327 12, 1
%e A038327 144, 24, 1
%e A038327 1728, 432, 36, 1
%e A038327 20736, 6912, 864, 48, 1
%e A038327 248832, 103680, 17280, 1440, 60, 1
%e A038327 2985984, 1492992, 311040, 34560, 2160, 72, 1
%e A038327 35831808, 20901888, 5225472, 725760, 60480, 3024, 84, 1
%p A038327 for i from 0 to 7 do seq(binomial(i, j)*12^(i-j), j = 0 .. i) od; - Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Dec 21 2007
%Y A038327 Sequence in context: A092527 A085840 A075072 this_sequence A157780 A010204 
               A124607
%Y A038327 Adjacent sequences: A038324 A038325 A038326 this_sequence A038328 A038329 
               A038330
%K A038327 nonn,tabl,easy
%O A038327 0,2
%A A038327 N. J. A. Sloane (njas(AT)research.att.com).

    
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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