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A022136
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Fibonacci sequence beginning 5, 11.
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6
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5, 11, 16, 27, 43, 70, 113, 183, 296, 479, 775, 1254, 2029, 3283, 5312, 8595, 13907, 22502, 36409, 58911, 95320, 154231, 249551, 403782, 653333, 1057115, 1710448, 2767563, 4478011, 7245574, 11723585, 18969159, 30692744, 49661903, 80354647, 130016550
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OFFSET
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0,1
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COMMENTS
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For n > 0, 2*a(n) is the number of ways to tile this strip of length n+1 (beginning with two vertical strips of length 3) using squares and dominoes.
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(End)
For n > 0, 5*a(n) is the number of ways to tile this strip of length n (beginning with a long vertical strip of length 9) using squares and dominoes.
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(End)
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LINKS
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FORMULA
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MATHEMATICA
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Transpose[NestList[{Last[#], Total[#]}&, {5, 11}, 40]][[1]] (* Harvey P. Dale, Apr 04 2011 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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