id:A088432 - OEIS Search Results

Search: id:A088432

Displaying 1-1 of 1 results found.

page 1

Number of ways to write n as n = u*v*w with 1<=u<v<=w.

+0
6

0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 2, 0, 1, 1, 2, 0, 3, 0, 2, 1, 1, 0, 4, 1, 1, 1, 2, 0, 4, 0, 3, 1, 1, 1, 5, 0, 1, 1, 4, 0, 4, 0, 2, 2, 1, 0, 7, 1, 3, 1, 2, 0, 4, 1, 4, 1, 1, 0, 8, 0, 1, 2, 4, 1, 4, 0, 2, 1, 4, 0, 9, 0, 1, 3, 2, 1, 4, 0, 6, 2, 1, 0, 8, 1, 1, 1, 4, 0, 8, 1, 2, 1, 1, 1, 9, 0, 3, 2, 6, 0, 4 (list; graph; listen)

	OFFSET	`1,12`
	COMMENT	`a(n)=0 iff n=1 or n is prime: a(A008578(n))=0, a(A002808(n))>0.`
	EXAMPLE	`n=12: (1,2,6), (1,3,4): therefore a(12)=2;` `n=18: (1,2,9), (1,3,6), (2,3,3): therefore a(18)=3.`
	CROSSREFS	`Cf. A034836, A088433, A088434.` `Sequence in context: A083715 A037135 A029360 this_sequence A071466 A155041 A108455` `Adjacent sequences: A088429 A088430 A088431 this_sequence A088433 A088434 A088435`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 01 2003`

page 1

Search completed in 0.006 seconds

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research