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