id:A039774 - OEIS Search Results

Search: id:A039774

Displaying 1-1 of 1 results found.

page 1

phi(a(n)) is equal to the product of (the sum of prime factors and the sum of exponents) of (a(n)-1).

+0
1

3, 5, 9, 25, 31, 57, 116, 144, 154, 288, 372, 414, 624, 792, 10032 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Next term if it exists is greater than 100000.`
	EXAMPLE	`phi(25)=20, 24=2^33^1, (2+3)(3+1)=20.`
	CROSSREFS	`Cf. A000010, A039697.` `Sequence in context: A089636 A083366 A006722 this_sequence A114001 A004044 A082711` `Adjacent sequences: A039771 A039772 A039773 this_sequence A039775 A039776 A039777`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.