id:A155474 - OEIS Search Results

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Odd nonprimes n with distinct smallest digits of n and n-th prime.

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1, 9, 15, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 69, 75, 77, 85, 87, 89, 91, 93, 95, 99, 105, 111, 117, 119, 123, 129, 131, 143, 145, 147, 153, 155, 159, 161, 165, 169, 171, 175, 177, 183, 185, 201, 203, 205, 207, 209, 213, 225, 235, 237, 243, 245, 247 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`If n=1=odd nonprime and 2=prime(1), then 1<2 and 1=a(1). If n=9=odd nonprime and 23=prime(9), then 9>2 and 9=a(2). If n=15=odd nonprime and 47=prime(15), then 1<4 and 15=a(3), etc.`
	CROSSREFS	`Cf. A000027, A000040, A014076.` `Sequence in context: A071904 A014076 A067800 this_sequence A100819 A046446 A046350` `Adjacent sequences: A155471 A155472 A155473 this_sequence A155475 A155476 A155477`
	KEYWORD	`nonn,base`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 23 2009`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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