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A089560 a(1) = 1. For n > 1, a(n) is the least unused number such that the concatenation a(n)a(n-1)...a(2)a(1) is prime. 13
1, 3, 4, 5, 7, 14, 9, 6, 57, 13, 18, 17, 16, 12, 20, 82, 42, 21, 45, 78, 98, 33, 133, 50, 28, 41, 124, 36, 44, 19, 80, 40, 75, 63, 372, 168, 179, 85, 84, 128, 64, 302, 151, 248, 10, 69, 123, 11, 54, 31, 149, 34, 185, 51, 213, 43, 282, 105, 125, 237, 55, 174, 96, 438, 215, 61 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Is this a rearrangement of the natural numbers?

LINKS

Table of n, a(n) for n=1..66.

CROSSREFS

Cf. A089710, A089711, A089561-A089573.

Sequence in context: A192269 A284618 A101759 * A248077 A239547 A060728

Adjacent sequences:  A089557 A089558 A089559 * A089561 A089562 A089563

KEYWORD

base,nonn

AUTHOR

Ray Chandler, Nov 22 2003

EXTENSIONS

Edited by Charles R Greathouse IV, Apr 29 2010

STATUS

approved

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Last modified March 20 23:22 EDT 2019. Contains 321354 sequences. (Running on oeis4.)