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A018840 Number of steps for {2,3} fairy knight to reach (n,0) on infinite chess-board. +0
1
0, 5, 4, 5, 2, 5, 2, 5, 4, 5, 4, 7, 4, 5, 6, 7, 6, 7, 6, 7, 8, 9, 8, 9, 8, 9, 10, 11, 10, 11, 10, 11, 12, 13, 12, 13, 12, 13, 14, 15, 14, 15, 14, 15, 16, 17, 16, 17, 16, 17, 18, 19, 18, 19, 18, 19, 20, 21, 20, 21, 20, 21, 22, 23, 22, 23, 22, 23, 24, 25, 24, 25, 24, 25, 26, 27, 26, 27, 26, 27 (list; graph; listen)
OFFSET

0,2

FORMULA

For n >= 18, f(n) = f(n-6)+2 (David W. Wilson).

CROSSREFS

Sequence in context: A071419 A019117 A123587 this_sequence A058209 A160789 A131291

Adjacent sequences: A018837 A018838 A018839 this_sequence A018841 A018842 A018843

KEYWORD

nonn

AUTHOR

Marc LeBrun (mlb(AT)well.com)

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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