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A185413 A000027 written clockwise as spiral and read counterclockwise. 1
2, 1, 4, 3, 12, 11, 10, 9, 8, 7, 6, 5, 16, 15, 14, 13, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 36, 35, 34, 33, 32, 31, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 64, 63, 62, 61, 60, 59, 58, 57 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A permutation of the natural numbers. Variant of A090861.

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..1024

Index to sequences related to permutations of the integers

EXAMPLE

  21--22--23--24--25--26

   |                   |

  20   7---8---9--10  27

   |   |           |   |

  19   6   1---2  11  28

   |   |       |   |   |

  18   5---4---3  12  29

   |               |   |

  17--16--15--14--13  30

                       |

  36--35--34--33--32--31

CROSSREFS

Cf. A185586, A054552.

Sequence in context: A284709 A307365 A032662 * A138509 A099331 A260319

Adjacent sequences:  A185410 A185411 A185412 * A185414 A185415 A185416

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Feb 08 2011

STATUS

approved

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Last modified April 21 13:17 EDT 2021. Contains 343153 sequences. (Running on oeis4.)