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A089570 a(1) = 17. 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. 1
17, 3, 6, 2, 1, 21, 35, 43, 23, 34, 47, 10, 26, 4, 14, 15, 12, 40, 18, 54, 51, 5, 27, 9, 132, 63, 166, 98, 78, 24, 30, 58, 105, 71, 75, 57, 70, 42, 11, 19, 38, 217, 285, 36, 77, 64, 56, 259, 45, 93, 102, 60, 122, 66, 96, 103, 267, 255, 92, 91, 276, 152, 208, 204, 90, 138 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Is this a rearrangement of the natural numbers?
LINKS
CROSSREFS
Sequence in context: A134907 A040281 A157115 * A040282 A139728 A336485
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 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)