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A089713 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. 2
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; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Does this prime exist for all n > 2?

LINKS

Table of n, a(n) for n=1..47.

CROSSREFS

Cf. A070219, A089715.

Sequence in context: A140458 A101520 A225862 * A067467 A069455 A211549

Adjacent sequences:  A089710 A089711 A089712 * A089714 A089715 A089716

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 17 2003

EXTENSIONS

Edited by David Wasserman, Feb 05 2004

STATUS

approved

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Last modified November 25 15:47 EST 2014. Contains 249998 sequences.