A317467 Squares visited by a (2,2)-leaper on a spirally numbered board and moving to the lowest available unvisited square at each step.

1, 13, 53, 25, 77, 21, 69, 17, 61, 137, 57, 129, 233, 125, 81, 165, 281, 161, 73, 153, 265, 149, 65, 141, 249, 389, 245, 133, 237, 373, 541, 369, 229, 169, 285, 433, 613, 429, 277, 157, 269, 413, 589, 409, 261, 145, 253, 393, 565, 769, 561, 385, 241, 377

Offset

1,2

Comments

Board is numbered with the square spiral:

.

17--16--15--14--13

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18 5---4---3 12 .

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19 6 1---2 11 .

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20 7---8---9--10 .

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21--22--23--24--25--26

Links

Daniël Karssen, Table of n, a(n) for n = 1..10000

Daniël Karssen, Figure showing the first 11 steps of the sequence

Daniël Karssen, Figure showing the first 9999 steps of the sequence

Formula

a(n) = A317466(n-1) + 1.

Crossrefs

Cf. A317466, A317469.

Sequence in context: A213837 A047903 A197790 * A076163 A207977 A056255

Adjacent sequences: A317464 A317465 A317466 * A317468 A317469 A317470

Keyword

nonn

Author

Daniël Karssen, Jul 29 2018

Status

approved