id:A090478 - OEIS Search Results

Search: id:A090478

Displaying 1-1 of 1 results found.

page 1

a(1) = 1; for n>=1, a(n+1) is the least number such that the concatenation of a(n), n, and a(n+1) is prime.

+0
1

1, 3, 17, 3, 7, 1, 3, 3, 3, 7, 3, 9, 7, 17, 27, 17, 7, 7, 7, 3, 3, 7, 9, 9, 1, 9, 23, 9, 1, 1, 1, 9, 3, 1, 11, 1, 1, 3, 9, 1, 9, 3, 11, 7, 11, 47, 19, 1, 1, 3, 23, 11, 7, 7, 1, 3, 17, 3, 1, 7, 3, 3, 3, 1, 11, 7, 9, 7, 1, 3, 1, 17, 9, 3, 23, 3, 1, 7, 9, 1, 1, 1, 3, 3, 7, 3, 3, 7, 3, 17, 3, 1, 11, 3, 3, 11 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`113, 3217, 1733 etc. are primes. 3217 is the prime obtained by placing 2 in the second gap.`
	CROSSREFS	`Sequence in context: A096404 A111824 A109216 this_sequence A140446 A124689 A093844` `Adjacent sequences: A090475 A090476 A090477 this_sequence A090479 A090480 A090481`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 02 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Nov 16 2005`

page 1

Search completed in 0.002 seconds

Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

AT&T Labs Research