id:A054027 - OEIS Search Results

Search: id:A054027

Displaying 1-1 of 1 results found.

page 1

Numbers n such that sum of divisors of n is not divisible by n.

+0
3

2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74 (list; graph; listen)

	OFFSET	`1,1`
	MAPLE	with(numtheory): [seq(`if`(sigma(i) mod i <> 0, i, print( )), i=1..90)];
	CROSSREFS	`Complement of A007691. Cf. A000203, A054024.` `Sequence in context: A129487 A097010 A132999 this_sequence A080907 A127161 A129657` `Adjacent sequences: A054024 A054025 A054026 this_sequence A054028 A054029 A054030`
	KEYWORD	`nonn`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) Jan 19, 2000`

page 1

Search completed in 0.002 seconds

Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research