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A317471 Squares visited by a (2,3)-leaper on a spirally numbered board and moving to the lowest available unvisited square at each step. 6
1, 26, 3, 20, 15, 10, 5, 24, 19, 14, 7, 12, 23, 18, 9, 16, 11, 22, 39, 8, 13, 6, 25, 4, 21, 2, 17, 60, 29, 34, 93, 88, 27, 46, 41, 76, 71, 114, 47, 28, 33, 54, 59, 134, 31, 86, 49, 116, 43, 106, 37, 96, 187, 90, 137, 56, 95, 30, 61, 38, 97, 32, 53, 48, 85, 80, 125, 120, 173 (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 4634, square 4698 is visited, after which there are no unvisited squares within one move.

LINKS

Daniël Karssen, Table of n, a(n) for n = 1..4634

Daniël Karssen, Figure showing the complete sequence

FORMULA

a(n) = A317470(n-1) + 1.

CROSSREFS

Cf. A317470, A317473.

Sequence in context: A040664 A040665 A040666 * A291151 A317326 A040660

Adjacent sequences:  A317468 A317469 A317470 * A317472 A317473 A317474

KEYWORD

nonn,fini,full

AUTHOR

Daniël Karssen, Jul 29 2018

STATUS

approved

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Last modified October 18 03:25 EDT 2021. Contains 348065 sequences. (Running on oeis4.)