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A038228
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Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*10^j.
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0
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1, 3, 10, 9, 60, 100, 27, 270, 900, 1000, 81, 1080, 5400, 12000, 10000, 243, 4050, 27000, 90000, 150000, 100000, 729, 14580, 121500, 540000, 1350000, 1800000, 1000000, 2187, 51030, 510300, 2835000, 9450000, 18900000, 21000000, 10000000
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| 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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EXAMPLE
| 1; 3,10; 9,60,100; 27,270,900,1000; 81,1080,5400,12000,10000; ...
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CROSSREFS
| Sequence in context: A185139 A033152 A202339 * A009030 A168331 A129489
Adjacent sequences: A038225 A038226 A038227 * A038229 A038230 A038231
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KEYWORD
| nonn,tabl,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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