id:A124808 - OEIS Search Results

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Number of numbers k <= n such that k^2 + 1 is square-free.

+0
3

1, 2, 3, 4, 5, 6, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 30, 31, 32, 33, 34, 35, 35, 36, 37, 37, 38, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 61, 62, 62, 63, 64 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(0)=1, a(n) = a(n-1) + 0^(A059592(n) - 1).`
	CROSSREFS	`Sequence in context: A097043 A053759 A060431 this_sequence A017862 A155919 A075011` `Adjacent sequences: A124805 A124806 A124807 this_sequence A124809 A124810 A124811`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 08 2006`

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.

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