id:A137148 - OEIS Search Results

Search: id:A137148

Displaying 1-1 of 1 results found.

page 1

a(n) = n*phi(n) for composite n.

+0
1

1, 8, 12, 32, 54, 40, 48, 84, 120, 128, 108, 160, 252, 220, 192, 500, 312, 486, 336, 240, 512, 660, 544, 840, 432, 684, 936, 640, 504, 880, 1080, 1012, 768, 2058, 1000, 1632, 1248, 972, 2200, 1344, 2052, 1624, 960, 1860, 2268, 2048, 3120, 1320, 2176, 3036 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Numbers which occur in A002618 but not A036689`
	MATHEMATICA	`a = {}; Do[If[PrimeQ[n], [null], AppendTo[a, n EulerPhi[n]]], {n, 1, 100}]; a`
	CROSSREFS	`Cf. A002618, A036689.` `Adjacent sequences: A137145 A137146 A137147 this_sequence A137149 A137150 A137151` `Sequence in context: A117802 A083485 A066934 this_sequence A045018 A067681 A132356`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Jan 23 2008`

page 1

Search completed in 0.002 seconds

Last modified October 11 09:12 EDT 2008. Contains 144832 sequences.

AT&T Labs Research