id:A144570 - OEIS Search Results

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Nonprime(prime(n)) (the "prime nonprimes")

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4

1, 4, 8, 10, 16, 20, 25, 27, 33, 40, 44, 51, 56, 58, 64, 72, 80, 82, 90, 94, 96, 105, 111, 118, 126, 132, 134, 140, 142, 146, 164, 169, 176, 178, 190, 194, 202, 208, 213, 219, 226, 230, 243, 245, 249, 252, 266, 282, 287, 289, 294, 300, 302, 315, 322, 328, 335 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=A141468(A000040(n)).`
	EXAMPLE	`If n=1, then a(1)=nonprime(prime(1))=nonprime(2)=1. If n=2, then a(2)=nonprime(prime(2))=nonprime( 3)=4. If n=3, then a(3)=nonprime(prime(3))=nonprime(5)=8, etc.`
	CROSSREFS	`Cf. A000040, A141468.` `Sequence in context: A153975 A020169 A082934 this_sequence A036311 A020209 A046559` `Adjacent sequences: A144567 A144568 A144569 this_sequence A144571 A144572 A144573`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 06 2009, Jan 07 2009`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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