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A317916 Squares visited by a (2,5)-leaper on a spirally numbered board and moving to the lowest available unvisited square at each step. 6
1, 84, 31, 18, 27, 44, 15, 48, 41, 12, 37, 22, 33, 26, 19, 30, 47, 16, 43, 10, 39, 32, 23, 36, 29, 20, 49, 14, 45, 38, 11, 42, 35, 24, 69, 98, 187, 88, 61, 104, 193, 94, 53, 118, 173, 286, 163, 82, 177, 134, 249, 144, 203, 110, 345, 216, 71, 2, 67, 60, 7, 50, 13, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Board is numbered with the square spiral:

  17--16--15--14--13

   |               |

  18   5---4---3  12   .

   |   |       |   |

  19   6   1---2  11   .

   |   |           |

  20   7---8---9--10   .

   |

  21--22--23--24--25--26

The sequence is finite: at step 7574, square 6760 is visited, after which there are no unvisited squares within one move.

LINKS

Daniël Karssen, Table of n, a(n) for n = 1..7574

Daniël Karssen, Figure showing the first 35 steps of the sequence

Daniël Karssen, Figure showing the complete sequence

FORMULA

a(n) = A317915(n-1) + 1.

CROSSREFS

Cf. A317915, A317918.

Sequence in context: A130432 A317437 A304379 * A066689 A008898 A033404

Adjacent sequences:  A317913 A317914 A317915 * A317917 A317918 A317919

KEYWORD

nonn,fini,full

AUTHOR

Daniël Karssen, Aug 11 2018

STATUS

approved

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Last modified September 26 13:50 EDT 2021. Contains 347668 sequences. (Running on oeis4.)