Search: id:A038299
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%I A038299
%S A038299 1,9,9,81,162,81,729,2187,2187,729,6561,26244,39366,26244,6561,
%T A038299 59049,295245,590490,590490,295245,59049,531441,3188646,7971615,
%U A038299 10628820,7971615,3188646,531441,4782969,33480783,100442349,167403915
%N A038299 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*9^j.
%D A038299 B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal 
               systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 
               109-121.
%F A038299 Row sums: sum_{j=0..i} T(i,j) = A001027(i). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Mar 30 2009]
%Y A038299 Sequence in context: A165830 A152018 A112296 this_sequence A165427 A050683 
               A092548
%Y A038299 Adjacent sequences: A038296 A038297 A038298 this_sequence A038300 A038301 
               A038302
%K A038299 nonn,tabl,easy
%O A038299 0,2
%A A038299 N. J. A. Sloane (njas(AT)research.att.com).

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