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Search: id:A085282
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| A085282 |
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Expansion of (1-5x+5x^2)/((1-x)(1-3x)(1-4x)). |
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+0
3
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| 1, 3, 10, 35, 126, 463, 1730, 6555, 25126, 97223, 379050, 1486675, 5858126, 23166783, 91869970, 365088395, 1453179126, 5791193143, 23100202490, 92207099715, 368247268126, 1471245680303, 5879752544610, 23503319648635
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Binomial transform of A085281.
Number of walks of length 2n+1 between two adjacent vertices in the cycle graph C_12. - Herbert Kociemba (kociemba(AT)t-online.de), Jul 05 2004
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FORMULA
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a(n)=4^n/3+3^n/2+1/6
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CROSSREFS
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Sequence in context: A088218 A110556 A072266 this_sequence A149036 A047127 A114196
Adjacent sequences: A085279 A085280 A085281 this_sequence A085283 A085284 A085285
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Jun 25 2003
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