A092590 - OEIS

This site is supported by donations to The OEIS Foundation.

A092590

a[n]=A065395[p(n)]=A065395[A000040(n)]; value of commutator of sigma and phi function at prime number arguments. Differs from A065394 since it is not monotonic.

-1, 1, 5, 8, 14, 22, 25, 31, 28, 48, 56, 73, 78, 76, 56, 80, 74, 138, 112, 120, 159, 136, 102, 156, 210, 185, 168, 126, 240, 212, 248, 212, 226, 240, 226, 300, 314, 283, 204, 252, 222, 474, 296, 412, 339, 388, 472, 360, 270, 472, 378, 368, 634, 396, 427, 316, 404, 592, 534, 628, 436, 434, 582, 480, 684, 456, 700, 836 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	EXAMPLE	`a[2]=-1=sigma[phi[2]-phi[sigma[2]]=sigma[1]-phi[3]=1-2=-1`
	CROSSREFS	`Cf. A000203, A000010, A092584-A092589, A065393-A065395, A033632.` `Sequence in context: A020757 A049693 A084139 * A065394 A124011 A101835` `Adjacent sequences: A092587 A092588 A092589 * A092591 A092592 A092593`
	KEYWORD	`sign`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Mar 03 2004`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 03:14 EST 2012. Contains 205694 sequences.