A089568 a(1) = 13. For n > 1, a(n) is the least unused number such that every concatenation a(n)a(n-1)...a(2)a(1) is prime.

13, 1, 2, 19, 3, 8, 15, 18, 10, 17, 45, 24, 22, 11, 37, 5, 30, 39, 81, 6, 76, 57, 69, 56, 84, 36, 49, 48, 38, 63, 148, 27, 75, 239, 31, 50, 171, 67, 116, 282, 42, 175, 23, 55, 236, 70, 278, 73, 90, 140, 91, 9, 210, 174, 126, 105, 89, 94, 224, 34, 114, 26, 133, 143, 54, 241

Offset

1,1

Comments

Is this a rearrangement of the natural numbers?

Links

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

Crossrefs

Cf. A089710, A089711, A089560-A089573.

Sequence in context: A030166 A010229 A188888 * A010232 A010233 A159820

Adjacent sequences: A089565 A089566 A089567 * A089569 A089570 A089571

Keyword

base,nonn

Author

Ray Chandler, Nov 22 2003

Extensions

Edited by Charles R Greathouse IV, Apr 29 2010

Status

approved