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Search: id:A060561
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| A060561 |
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Number of ways to color vertices of a 9-gon using <= n colors, allowing rotations and reflections. |
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+0
1
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| 0, 1, 46, 1219, 15084, 110085, 563786, 2250311, 7472984, 21552969, 55605670, 131077771, 286779076, 589324749, 1148105154, 2136122255, 3818273456, 6588925841, 11020906014, 17928333139, 28446045340, 44128712341, 67073090106
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,500
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FORMULA
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(n^9+9*n^5+2*n^3+6*n)/18.
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PROGRAM
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(PARI) { for (n=0, 500, write("b060561.txt", n, " ", (n^9 + 9*n^5 + 2*n^3 + 6*n)/18); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 07 2009]
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CROSSREFS
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Sequence in context: A035718 A010998 A004424 this_sequence A066403 A028574 A078195
Adjacent sequences: A060558 A060559 A060560 this_sequence A060562 A060563 A060564
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Apr 12 2001
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