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Search: id:A038260
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| A038260 |
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Triangle read by rows: T(n,k) = binomial(n,k)*6^(n-k)*6^k, 0<=k<=n. |
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1
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| 1, 6, 6, 36, 72, 36, 216, 648, 648, 216, 1296, 5184, 7776, 5184, 1296, 7776, 38880, 77760, 77760, 38880, 7776, 46656, 279936, 699840, 933120, 699840, 279936, 46656, 279936, 1959552, 5878656, 9797760, 9797760, 5878656, 1959552, 279936, 1679616
(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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MAPLE
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seq(seq(binomial(n, k)*6^(n-k)*6^k, k=0..n), n=0..8); (C. Ronaldo)
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CROSSREFS
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Sequence in context: A056464 A056454 A056452 this_sequence A165424 A156099 A125510
Adjacent sequences: A038257 A038258 A038259 this_sequence A038261 A038262 A038263
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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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