A337838 - OEIS

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A337838

Permutation of the natural numbers formed by numbering an infinite square grid by a counterclockwise triangular spiral and visiting them by a counterclockwise stair step spiral.

1, 2, 13, 3, 14, 4, 5, 19, 20, 6, 7, 8, 24, 25, 9, 10, 12, 31, 60, 32, 61, 33, 62, 34, 63, 35, 15, 17, 18, 41, 42, 74, 75, 43, 44, 21, 22, 23, 48, 49, 83, 84, 50, 51, 26, 27, 11, 30, 59, 96, 143, 97, 144, 98, 145, 99, 146, 100, 147, 101, 148, 102, 64, 36, 16

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

OFFSET

1,2

LINKS

Kevin Ryde, Table of n, a(n) for n = 1..10000

Index entries for sequences that are permutations of the natural numbers

EXAMPLE

The path begins:

17 15 34

18 4--14 33

| |

19---5 3--13 32