id:A067565 - OEIS Search Results

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Inverse of Ron Graham's sequence (A006255), or zero iff n is a prime.

+0
1

1, 0, 0, 4, 0, 2, 0, 3, 9, 5, 0, 6, 0, 7, 8, 16, 0, 10, 0, 12, 14, 11, 0, 15, 25, 13, 18, 21, 0, 20, 0, 24, 22, 17, 27, 36, 0, 19, 26, 28, 0, 30, 0, 33, 32, 23, 0, 35, 49, 40, 34, 39, 0, 48, 44, 42, 38, 29, 0, 45, 0, 31, 50, 64, 52, 55, 0, 51, 46, 54 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`a(n) = n iff n is a perfect square.`
	CROSSREFS	`Sequence in context: A127153 A054375 A136452 this_sequence A010635 A019200 A087604` `Adjacent sequences: A067562 A067563 A067564 this_sequence A067566 A067567 A067568`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 30 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research