id:A161538 - OEIS Search Results

Search: id:A161538

Displaying 1-1 of 1 results found.

page 1

Numbers n such that composite (n) + n is a prime, where composite (n) denotes the n-th composite number.

+0
1

1, 3, 4, 8, 11, 27, 29, 40, 44, 45, 47, 57, 58, 66, 69, 71, 83, 84, 90, 100, 103, 108, 111, 116, 117, 127, 133, 135, 136, 144, 147, 151, 153, 156, 160, 163, 176, 179, 197, 201, 211, 214, 216, 221, 239, 242, 251, 252, 255, 260, 263, 269, 272, 274, 275, 280, 287 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`8 is in the list because composite(8) + 8 = 15 + 8 = 23 is prime` `27 is in the list because composite(27) + 27 = 40 + 27 = 67 is prime`
	CROSSREFS	`A002808` `Sequence in context: A034417 A126873 A050316 this_sequence A080646 A050102 A022432` `Adjacent sequences: A161535 A161536 A161537 this_sequence A161539 A161540 A161541`
	KEYWORD	`nonn`
	AUTHOR	`Claudio L Meller (claudiomeller(AT)gmail.com), Jun 13 2009`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research