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Search: id:A116973
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| A116973 |
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If n mod 2 = 0 then (3^(n+3)-19)/8 else (3^(n+3)-1)/8. |
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+0
1
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| 1, 10, 28, 91, 271, 820, 2458, 7381, 22141, 66430, 199288, 597871, 1793611, 5380840, 16142518, 48427561, 145282681, 435848050, 1307544148, 3922632451, 11767897351, 35303692060, 105911076178, 317733228541, 953199685621
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Number of moves to solve Type 4 Zig-Zag puzzle.
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REFERENCES
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Richard I. Hess, Compendium of Over 7000 Wire Puzzles, privately printed, 1991.
Richard I. Hess, Analysis of Ring Puzzles, booklet distributed at 13-th International Puzzle Party, Amsterdam, Aug 20 1993.
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MAPLE
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f:=n->if n mod 2 = 0 then (3^(n+3)-19)/8 else (3^(n+3)-1)/8; fi;
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CROSSREFS
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Sequence in context: A124703 A126364 A076712 this_sequence A003665 A066527 A103423
Adjacent sequences: A116970 A116971 A116972 this_sequence A116974 A116975 A116976
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KEYWORD
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nonn
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AUTHOR
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njas, Apr 01 2006
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