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A090311 Concatenation of two distinct primes p and q, p < q. 2
23, 25, 35, 27, 37, 57, 211, 311, 511, 711, 213, 313, 513, 713, 1113, 217, 317, 517, 717, 1117, 1317, 219, 319, 519, 719, 1119, 1319, 1719 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next n numbers end in prime(n+1).

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

FromDigits[Flatten[IntegerDigits/@#]]&/@Flatten[Table[Join[{Prime[c]}, {Prime[ n]}], {n, 10}, {c, n-1}], 1](* Harvey P. Dale, Nov 27 2019 *)

CROSSREFS

Cf. A090309, A090310, A090312.

Sequence in context: A305469 A093805 A033629 * A172015 A112073 A050864

Adjacent sequences:  A090308 A090309 A090310 * A090312 A090313 A090314

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Nov 30 2003

STATUS

approved

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Last modified August 9 11:00 EDT 2020. Contains 336323 sequences. (Running on oeis4.)