A162922 - OEIS

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A162922

Square array read by antidiagonals: m is the a(n,m)th positive integer among those which are coprime to n. Or a(n,m) = 0 if m and n are not coprime.

1, 1, 2, 1, 0, 3, 1, 2, 2, 4, 1, 0, 0, 0, 5, 1, 2, 2, 3, 3, 6, 1, 0, 3, 0, 4, 0, 7, 1, 2, 0, 4, 3, 0, 4, 8, 1, 0, 3, 0, 0, 0, 5, 0, 9 (list; table; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	EXAMPLE	`Rows 1 through 7 of the array:` `n=1: 1,2,3,4,5,6,7,8,9,...` `n=2: 1,0,2,0,3,0,4,0,5,...` `n=3: 1,2,0,3,4,0,5,6,0,...` `n=4: 1,0,2,0,3,0,4,0,5,...` `n=5: 1,2,3,4,0,5,6,7,8,...` `n=6: 1,0,0,0,2,0,3,0,0,...` `n=7: 1,2,3,4,5,6,0,7,8,...`
	CROSSREFS	`Sequence in context: A141543 A182720 A146540 * A102057 A157497 A131358` `Adjacent sequences: A162919 A162920 A162921 * A162923 A162924 A162925`
	KEYWORD	`more,nonn,tabl`
	AUTHOR	`Leroy Quet, Jul 17 2009`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.