id:A032695 - OEIS Search Results

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Only 5 digits from (1,2,3,4,5,6,7,8,9) can precede a(n) to form a prime.

+0
1

1, 7, 9, 39, 63, 77, 83, 221, 229, 237, 521, 547, 689, 719, 733, 741, 803, 861, 907, 1283, 1647, 2003, 2051, 2073, 2467, 2727, 3003, 3063, 3331, 3487, 3597, 3609, 3629, 3719, 3773, 3857, 3997, 4421, 4449, 4499, 4747, 4919, 5083, 5439, 5541 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`If a(n) = 77 then we find '2'77, '5'77, '6'77, '8'77 and '9'77 to be primes.`
	CROSSREFS	`Sequence in context: A082536 A057590 A140787 this_sequence A007449 A067649 A025631` `Adjacent sequences: A032692 A032693 A032694 this_sequence A032696 A032697 A032698`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.`

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

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