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A083192 a(1) = 1, then the rearrangement of composite numbers such that the concatenation of n terms from the n-th term is a prime. (Concatenation of n-th term to (2n-1)th term is a prime number). +0
2
1, 4, 21, 6, 49, 8, 77, 9, 39, 10, 111, 12 (list; graph; listen)
OFFSET

1,2

EXAMPLE

421, 21649, etc. are primes.

CROSSREFS

Cf. A083193.

Sequence in context: A012841 A074195 A103896 this_sequence A128452 A076943 A138228

Adjacent sequences: A083189 A083190 A083191 this_sequence A083193 A083194 A083195

KEYWORD

base,more,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 27 2003

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.


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