id:A060272 - OEIS Search Results

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Distance from n^2 to closest prime.

+0
4

1, 1, 2, 1, 2, 1, 2, 3, 2, 1, 6, 5, 2, 1, 2, 1, 4, 7, 2, 1, 2, 3, 6, 1, 6, 1, 2, 3, 2, 7, 6, 3, 2, 3, 2, 1, 2, 3, 2, 1, 12, 5, 2, 3, 2, 3, 2, 5, 2, 3, 8, 3, 6, 1, 2, 1, 2, 3, 10, 7, 2, 3, 2, 3, 4, 1, 4, 3, 2, 3, 2, 5, 4, 1, 2, 3, 2, 5, 6, 3, 2, 5, 6, 1, 4, 3, 4, 3, 2, 1, 6, 3, 2, 1, 4, 5, 4, 3, 2, 7, 8, 5, 2 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n)=abs(A000290(n)-A113425(n))=abs(A000290(n)-A113426(n)). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 31 2005`
	EXAMPLE	`n=1: n^2=1 is surrounded by primes {-2,2} and 2 is closer, so a(1)=1; n=11: n^2=121 is between primes {113,127} and closer to 127, thus a(11)=6.`
	MAPLE	`[seq(min(nextprime(i^2)-i^2, i^2-prevprime(i^2)), i=2..256)]; n=1 computed separately.`
	CROSSREFS	`Cf. A007491, A053001, A058043, A056927, A053000, A051700, A060268-A060269, A060272, A059959, A059790.` `Adjacent sequences: A060269 A060270 A060271 this_sequence A060273 A060274 A060275` `Sequence in context: A070966 A072504 A072499 this_sequence A129985 A085243 A092243`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Mar 23 2001`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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