id:A099008 - OEIS Search Results

Search: id:A099008

Displaying 1-1 of 1 results found.

page 1

Numbers n such that the denominator of the 2n-th Bernoulli number contains n but sum_{d|n} sigma(d)/phi(d) is not an integer.

+0
1

546, 903, 1806, 2730, 6162, 6510, 9030, 10230, 12090, 12246, 12810, 15834, 20130, 20670, 23478, 23790, 28938, 30030, 30810 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`The denominator of the 1806-th Bernoulli number is 1806 and sum_{d\|1806} sigma(d)/phi(d)=172/3 is not an integer`
	CROSSREFS	`Cf. A068991.` `Sequence in context: A159626 A020259 A053327 this_sequence A043479 A002606 A047637` `Adjacent sequences: A099005 A099006 A099007 this_sequence A099009 A099010 A099011`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 07 2004`

page 1

Search completed in 0.002 seconds

Last modified November 25 08:46 EST 2009. Contains 167481 sequences.