id:A089389 - OEIS Search Results

Search: id:A089389

Displaying 1-1 of 1 results found.

page 1

Sum of the smallest and the largest nontrivial divisor of n or 0 if n is 1 or a prime.

+0
1

0, 0, 0, 4, 0, 5, 0, 6, 6, 7, 0, 8, 0, 9, 8, 10, 0, 11, 0, 12, 10, 13, 0, 14, 10, 15, 12, 16, 0, 17, 0, 18, 14, 19, 12, 20, 0, 21, 16, 22, 0, 23, 0, 24, 18, 25, 0, 26, 14, 27, 20, 28, 0, 29, 16, 30, 22, 31, 0, 32, 0, 33, 24, 34, 18, 35, 0, 36, 26, 37, 0, 38, 0, 39, 28, 40, 18, 41, 0, 42 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`The product of the smallest and the largest nontrivial divisor is n. a(2m) = m+2, m >1.`
	CROSSREFS	`Sequence in context: A126836 A055241 A055242 this_sequence A081550 A046779 A051352` `Adjacent sequences: A089386 A089387 A089388 this_sequence A089390 A089391 A089392`
	KEYWORD	`easy,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 10 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Sep 15 2005`

page 1

Search completed in 0.002 seconds

Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research