id:A008507 - OEIS Search Results

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Number of odd composite numbers less than n-th odd prime.

+0
3

0, 0, 0, 1, 1, 2, 2, 3, 5, 5, 7, 8, 8, 9, 11, 13, 13, 15, 16, 16, 18, 19, 21, 24, 25, 25, 26, 26, 27, 33, 34, 36, 36, 40, 40, 42, 44, 45, 47, 49, 49, 53, 53, 54, 54, 59, 64, 65, 65, 66, 68, 68, 72, 74, 76, 78, 78, 80, 81, 81, 85, 91, 92, 92, 93, 99, 101, 105, 105, 106, 108, 111, 113, 115, 116, 118 (list; graph; listen)

	OFFSET	`1,6`
	FORMULA	`[(Odd Primes - 1)/2] - n for n > 0, or A005097(n) - A000027(n). For example, A005097(1) - A000027(1) = 1 - 1 = 0, A005097(2) - A000027(2) = 2 - 2 = 0, A005097(9) - A000027(9) = 14 - 9 = 5. - William A. Tedeschi (fynmun(AT)hotmail.com), Apr 25 2008`
	CROSSREFS	`Sequence in context: A089366 A113827 A033189 this_sequence A028364 A011971 A060048` `Adjacent sequences: A008504 A008505 A008506 this_sequence A008508 A008509 A008510`
	KEYWORD	`nonn`
	AUTHOR	`Gary Findley (chfindley(AT)alpha.nlu.edu)`
	EXTENSIONS	`More terms from David W. Wilson (davidwwilson(AT)comcast.net), Jan 13, 2000.`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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