id:A109269 - OEIS Search Results

Search: id:A109269

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Numbers n such that n^2 is less than the nearest interprime to n^2.

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5, 7, 13, 19, 23, 27, 29, 32, 34, 35, 37, 42, 43, 44, 46, 47, 49, 53, 55, 58, 61, 63, 68, 69, 71, 75, 77, 80, 82, 83, 86, 88, 89, 93, 98, 101, 102, 103, 107, 108, 113, 118, 119, 121, 127, 128, 131, 132, 133, 135, 136, 139, 142, 143, 144, 145, 149, 152, 155, 161, 164 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`7 is in the sequence because the nearest interprime to 49 is 50; 8 is not in the sequence because the nearest interprime to 64 is 64; 10 is not in the sequence because the nearest interprime to 100 is 99.`
	MAPLE	`a:=proc(n) if n^2< (1/2)*(prevprime(n^2)+nextprime(n^2)) then n else fi end: seq(a(n), n=2..200); (Deutsch)`
	CROSSREFS	`Cf. A075190, A109270.` `Sequence in context: A073574 A092110 A086844 this_sequence A114275 A156107 A124661` `Adjacent sequences: A109266 A109267 A109268 this_sequence A109270 A109271 A109272`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 24 2005`
	EXTENSIONS	`More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jun 26 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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