A334619 - OEIS

A334619

Squares visited on a board numbered in counterclockwise square spiral by successively turning to the left square if it is unvisited or to the right square otherwise.

1, 2, 3, 4, 15, 16, 5, 18, 19, 6, 7, 8, 23, 24, 9, 10, 11, 28, 29, 12, 13, 14, 33, 34, 61, 62, 35, 36, 17, 38, 39, 68, 69, 40, 41, 20, 21, 22, 45, 46, 77, 78, 47, 48, 25, 26, 27, 52, 53, 86, 87, 54, 55, 30, 31, 32, 59, 60, 95, 96, 139, 140, 97, 98, 63, 64, 37

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

The path begins:

...31

17 16--15 14--13 30

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18---5 4---3 12--29

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19---6 1---2 11--28

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