id:A073411 - OEIS Search Results

Search: id:A073411

Displaying 1-1 of 1 results found.

page 1

cototient(x) - 1 where x are the odd semiprimes (i.e. x are odd terms in A001358).

+0
1

2, 6, 8, 4, 12, 10, 14, 6, 18, 14, 20, 16, 24, 16, 20, 30, 18, 32, 22, 38, 26, 22, 10, 42, 44, 24, 48, 22, 32, 34, 54, 28, 12, 60, 62, 40, 26, 68, 34, 44, 28, 72, 46, 36, 74, 28, 50, 80, 30, 84, 32, 42, 56, 90, 46, 16, 98, 62, 34, 48, 102, 64, 104, 38, 108, 34, 110, 52, 70 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`If the Goldbach conjecture is true, all even numbers appear at least one time in the sequence since pq-phi(pq) -1 = p + q.`
	CROSSREFS	`Cf. A051953.` `Adjacent sequences: A073408 A073409 A073410 this_sequence A073412 A073413 A073414` `Sequence in context: A048741 A115317 A117932 this_sequence A121862 A095677 A011045`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 23 2002`

page 1

Search completed in 0.002 seconds

Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

AT&T Labs Research