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A101251 Primes that are a concatenation of 2, 3, 5 and a prime. 5
2357, 23531, 23537, 23561, 23567, 235181, 235199, 235211, 235241, 235307, 235337, 235349, 235397, 235439, 235523, 235541, 235577, 235601, 235607, 235661, 235673, 235751, 235787, 235811, 235877, 235919, 235967, 235997, 2351033, 2351171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

Peter Alfeld, The 10,000 smallest prime numbers.

EXAMPLE

2357 is a prime of order four since it is concatenated from the primes 2,3,5 and 7.

MATHEMATICA

Select[ Table[ FromDigits[ Flatten[ IntegerDigits /@ {2, 3, 5, Prime[n]}]], {n, 200}], PrimeQ[ # ] &] (* Robert G. Wilson v, Dec 20 2004 *)

CROSSREFS

Cf. A101218, A101219, A101249, A101250, A101252.

Sequence in context: A073037 A160403 A156987 * A132904 A030473 A134649

Adjacent sequences:  A101248 A101249 A101250 * A101252 A101253 A101254

KEYWORD

nonn,easy,base

AUTHOR

Parthasarathy Nambi, Dec 16 2004

EXTENSIONS

Extended by Ray Chandler and Robert G. Wilson v, Dec 22 2004

STATUS

approved

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Last modified January 21 04:53 EST 2020. Contains 331104 sequences. (Running on oeis4.)