id:A083996 - OEIS Search Results

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a(1) = 1; then numbers such that the concatenation a(n)a(n-1)...a(2)a(1)a(2)...a(n-1)a(n) is a prime for n>1.

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1, 3, 9, 3, 11, 1, 23, 49, 21, 3, 17, 9, 13, 3, 47, 19, 41, 43, 3, 51, 371, 183, 3, 21, 103, 53, 33, 33, 91, 41, 99, 433, 443, 93, 111, 501, 73, 11, 139, 177, 171, 429, 521, 333, 417, 1, 341, 213, 253, 171, 387, 171, 779, 463, 687, 861, 1131, 39, 539, 231, 1513, 263, 369 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Cf. A083997, A083998, A083999, A084000, A083401.` `Sequence in context: A099319 A010707 A097665 this_sequence A010259 A120429 A101431` `Adjacent sequences: A083993 A083994 A083995 this_sequence A083997 A083998 A083999`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 23 2003`
	EXTENSIONS	`More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 22 2003, Aug 03 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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