

A089710


a(1) = 3. For n > 1, a(n) is the least unused number such that the concatenation a(n)a(n1)...a(2)a(1) is prime.


16



3, 1, 6, 9, 4, 20, 13, 29, 19, 2, 7, 18, 12, 41, 36, 30, 72, 25, 27, 8, 28, 42, 47, 114, 85, 38, 16, 117, 177, 24, 11, 66, 34, 53, 37, 264, 48, 126, 96, 87, 39, 261, 99, 65, 124, 419, 21, 147, 55, 321, 240, 62, 40, 69, 92, 60, 49, 287, 289, 393, 227, 745, 84, 149, 58, 54, 141
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OFFSET

1,1


COMMENTS

Is this a rearrangement of the natural numbers?


LINKS

Table of n, a(n) for n=1..67.


EXAMPLE

3, 13, 613, 9613, 49613, 2049613, ... etc. are primes.


CROSSREFS

Cf. A089711.
Sequence in context: A049410 A013610 A008573 * A065918 A020861 A163213
Adjacent sequences: A089707 A089708 A089709 * A089711 A089712 A089713


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy, Nov 17 2003


EXTENSIONS

More terms from Ray Chandler, Nov 21 2003
Edited by Charles R Greathouse IV, Apr 29 2010


STATUS

approved



