id:A037040 - OEIS Search Results

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Number of odd nonprimes < (2n+1)^2.

+0
2

0, 1, 4, 10, 19, 31, 46, 65, 84, 109, 136, 166, 199, 236, 275, 319, 364, 413, 466, 521, 578, 642, 707, 776, 844, 923, 996, 1079, 1168, 1254, 1342, 1436, 1535, 1636, 1740, 1846, 1960, 2074, 2186, 2310, 2434, 2559, 2690, 2825, 2961, 3103, 3248, 3392, 3542 (list; graph; listen)

	OFFSET	`0,3`
	REFERENCES	`C. R. Christofferson, 15219 Wickmere, Houston, TX 77062, (281) 486-4139 (unpublished notes)`
	EXAMPLE	`The odd nonprimes < 25 are 1,9,15,21, so a(2)=4.`
	CROSSREFS	`A038377[ n ]-1.` `Sequence in context: A025720 A022793 A005448 this_sequence A007077 A009895 A027371` `Adjacent sequences: A037037 A037038 A037039 this_sequence A037041 A037042 A037043`
	KEYWORD	`nonn`
	AUTHOR	`C.R.Christofferson (magpie56(AT)aol.com)`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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