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A038208
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Triangle whose (i,j)-th entry is binomial(i,j)*2^i.
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3
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1, 2, 2, 4, 8, 4, 8, 24, 24, 8, 16, 64, 96, 64, 16, 32, 160, 320, 320, 160, 32, 64, 384, 960, 1280, 960, 384, 64, 128, 896, 2688, 4480, 4480, 2688, 896, 128, 256, 2048, 7168, 14336, 17920, 14336, 7168, 2048, 256, 512, 4608, 18432, 43008
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Triangle obtained from expansion of (2+2x)^n.
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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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CROSSREFS
| Row sums : A000302 (powers of 4).
Sequence in context: A136534 A121175 A183397 * A116694 A137778 A000017
Adjacent sequences: A038205 A038206 A038207 * A038209 A038210 A038211
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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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