id:A091995 - OEIS Search Results

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A091995

Permutation of the natural numbers.

+0
3

1, 2, 3, 4, 5, 7, 6, 8, 11, 9, 12, 16, 10, 13, 17, 22, 14, 18, 23, 29, 15, 19, 24, 30, 37, 20, 25, 31, 38, 46, 21, 26, 32, 39, 47, 56, 27, 33, 40, 48, 57, 67, 28, 34, 41, 49, 58, 68, 79, 35, 42, 50, 59, 69, 80, 92, 36, 43, 51, 60, 70, 81, 93, 106, 44, 52, 61, 71, 82, 94, 107 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Write the natural numbers as a triangle:` `1` `2...3` `4...5...6` `7...8...9..10` `11..12..13..14..15` `Now read off the numbers diagonally from upper-right to lower-left. 1 -> 2 -> 3 -> 4 -> 5 -> 7 -> 6 -> 8 -> 11 -> 9 -> 12 -> ...`
	CROSSREFS	`a(n) = A090894(n-1)+1. Cf. A092180.` `Sequence in context: A056018 A087465 A056017 this_sequence A066937 A120750 A023826` `Adjacent sequences: A091992 A091993 A091994 this_sequence A091996 A091997 A091998`
	KEYWORD	`easy,nonn`
	AUTHOR	`Felix Tubiana (fat2(AT)columbia.edu), Mar 17 2004`

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Last modified September 5 19:27 EDT 2008. Contains 143485 sequences.

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