id:A058011 - OEIS Search Results

Search: id:A058011

Displaying 1-1 of 1 results found.

page 1

Consider the sequence {b(m)} of nonprimes; sequence gives values of m where gcd{m, b(m)} increases.

+0
3

1, 4, 6, 8, 27, 30, 33, 96, 100, 120, 330, 335, 340, 350, 355, 360, 1008, 1080, 1092, 1116, 1122, 1128, 1134, 3059, 3066, 3073, 3080, 3087, 3094, 8408, 8424, 8440, 8456, 8464, 8472, 23526, 23535, 24300, 64540, 64580, 64610, 64620, 64650, 64690, 64700 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`a(4) = 8 because eight is the fourth nonprime number and GCD(4,8) > GCD(3,6).`
	MATHEMATICA	`r=0; Do[a = GCD[n, n - PrimePi[n] ]; If[a > r, r = a; Print[n]], {n, 1, 10^5} ]`
	CROSSREFS	`Cf. A058012. Apart from initial term same as A057809.` `Sequence in context: A019160 A126233 A059889 this_sequence A089330 A108270 A019161` `Adjacent sequences: A058008 A058009 A058010 this_sequence A058012 A058013 A058014`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 13 2000`

page 1

Search completed in 0.002 seconds

Last modified December 6 11:04 EST 2009. Contains 170427 sequences.

AT&T Labs Research