A083925 - OEIS

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A083925

Inverse function of N -> N injection A057548.

0, 0, 0, 1, 0, 0, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 4, 5, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 10, 0, 11, 12, 13, 0, 0, 0, 14, 15, 0, 16, 17, 18, 0, 19, 20, 21, 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,8`
	COMMENTS	`a(1)=0 because A057548(0)=1, but a(n) = 0 also for those n which do not occur as values of A057548. All positive natural numbers occur here once.`
	FORMULA	`a(n) = A083923(n)*A072771(n)`
	CROSSREFS	`a(A057548(n)) = n for all n. Cf. A083926-A083929, A083935.` `Sequence in context: A013510 A013504 A173012 * A045830 A078771 A072771` `Adjacent sequences: A083922 A083923 A083924 * A083926 A083927 A083928`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (MyFirstname.MySurname(AT)iki.fi) May 13 2003`

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Last modified February 16 05:31 EST 2012. Contains 205860 sequences.