A316884 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A316884

Squares visited by moving diagonally one square on a spirally numbered board and moving to the lowest available unvisited square at each step.

1, 3, 11, 9, 23, 7, 19, 5, 15, 33, 13, 29, 53, 27, 25, 47, 77, 45, 21, 41, 69, 39, 17, 35, 61, 95, 59, 31, 55, 87, 127, 85, 51, 49, 79, 117, 163, 115, 75, 43, 71, 107, 151, 105, 67, 37, 63, 97, 139, 189, 137, 93, 57, 89, 129, 177, 233, 175, 125, 83, 81, 119

(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 .