id:A089713 - OEIS Search Results

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a(n) is the largest prime that is the concatenation of n and m for some m < n, or 0 if no such prime exists.

+0
3

0, 0, 31, 43, 53, 61, 73, 83, 97, 109, 113, 127, 139, 149, 1511, 1613, 179, 1811, 1913, 2017, 2113, 2221, 2311, 2423, 2521, 2621, 2719, 2819, 2927, 3023, 3121, 3229, 3331, 3433, 3533, 3631, 3733, 3833, 3931, 4027, 4139, 4241, 4339, 4441, 4523, 4643, 4733 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Does this prime exist for all n > 2?`
	CROSSREFS	`Cf. A070219, A089715.` `Sequence in context: A158754 A140458 A101520 this_sequence A067467 A069455 A118637` `Adjacent sequences: A089710 A089711 A089712 this_sequence A089714 A089715 A089716`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 17 2003`
	EXTENSIONS	`Edited by David Wasserman (wasserma(AT)spawar.navy.mil), Feb 05 2004`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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