id:A118572 - OEIS Search Results

Search: id:A118572

Displaying 1-1 of 1 results found.

page 1

Sophie Germain primes for which the product of the digits is square.

+0
1

11, 41, 191, 281, 419, 491, 509, 683, 809, 911, 1013, 1019, 1031, 1049, 1103, 1229, 1289, 1409, 1499, 1559, 1601, 1889, 1901, 2003, 2039, 2063, 2069, 2129, 2693, 2819, 2903, 2963, 3023, 3413, 3803, 4019, 4073, 4409, 4919, 5003, 5039, 5051, 5081, 5303 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`1499 is in the sequence because (1) it is a Sophie Germain prime and (2) the product of its digits 149*9=324, which is a square.`
	CROSSREFS	`Cf. A005384.` `Sequence in context: A139933 A156733 A079304 this_sequence A092445 A068840 A082424` `Adjacent sequences: A118569 A118570 A118571 this_sequence A118573 A118574 A118575`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), May 07 2006`

page 1

Search completed in 0.002 seconds

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

AT&T Labs Research