id:A137944 - OEIS Search Results

Search: id:A137944

Displaying 1-1 of 1 results found.

page 1

Numbers such that the number of composite divisors is a multiple of the number of prime divisors; a(1)=1.

+0
3

2, 3, 4, 5, 7, 8, 9, 11, 13, 16, 17, 19, 23, 25, 27, 29, 31, 32, 36, 37, 41, 43, 47, 49, 53, 59, 61, 64, 67, 71, 73, 79, 81, 83, 89, 97, 100, 101, 103, 107, 109, 113, 120, 121, 125, 127, 128, 131, 137, 139, 144, 149, 151, 157, 163, 167, 168, 169, 173, 179, 181, 191, 193 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A055212(a(n)) mod A001221(a(n)) = 0;` `union of A000961 and A137945.`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..10000` `Eric Weisstein's World of Mathematics, Divisor Function`
	CROSSREFS	`Sequence in context: A086486 A071139 A046686 this_sequence A087441 A059046 A144711` `Adjacent sequences: A137941 A137942 A137943 this_sequence A137945 A137946 A137947`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Febr 24 2008`

page 1

Search completed in 0.002 seconds

Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

AT&T Labs Research