id:A068226 - OEIS Search Results

Search: id:A068226

Displaying 1-1 of 1 results found.

page 1

Neighbor in 2-1 direction of numbers arranged as clockwise spiral.

+0
2

6, 1, 4, 5, 18, 19, 20, 7, 8, 9, 2, 3, 14, 15, 16, 17, 38, 39, 40, 41, 42, 21, 22, 23, 24, 25, 10, 11, 12, 13, 32, 33, 34, 35, 36, 37, 66, 67, 68, 69, 70, 71, 72, 43, 44, 45, 46, 47, 48, 49, 26, 27, 28, 29, 30, 31, 58, 59, 60, 61, 62, 63, 64, 65, 102, 103, 104, 105, 106, 107 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Any offset (x,y) in this spiral is a permutation of the natural numbers.`
	LINKS	`F. Ellermann, Some EIS sequences based on a spiral of natural numbers.` `Index entries for sequences that are permutations of the natural numbers.`
	CROSSREFS	`n = A068225(A068226(n)). Offset A068225: (+1, 0), A068226: (-1, 0).` `Sequence in context: A118740 A082344 A021865 this_sequence A011237 A016534 A010137` `Adjacent sequences: A068223 A068224 A068225 this_sequence A068227 A068228 A068229`
	KEYWORD	`nonn,easy`
	AUTHOR	`Frank.Ellermann(AT)t-online.de, Feb 22 2002`

page 1

Search completed in 0.002 seconds

Last modified August 8 15:51 EDT 2008. Contains 142751 sequences.

AT&T Labs Research