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A090911
a(n+1) is the least positive integer k such that (1) k is a one-digit number or the concatenation of two or more consecutive numbers; (2) |k-a(n)| is prime; and (3) |k-a(n)| is not the absolute difference of two previous consecutive members of the sequence.
3
1, 3, 6, 1, 8, 45, 2, 789, 56, 3, 34, 5, 78, 7, 234, 1, 12, 1213, 456, 7, 1314, 23, 4, 45, 1516, 5, 234, 23, 6, 67, 8, 345, 34, 123, 56, 9, 1112, 3, 910, 23, 456, 67, 234, 1415, 6, 89, 456, 2345, 4, 567, 1718, 9, 2122, 23, 1516, 89, 910, 1011, 2, 2223, 10111012, 1415
OFFSET
0,2
CROSSREFS
Sequence in context: A176092 A118012 A022836 * A198491 A336245 A108813
KEYWORD
base,nonn,easy
AUTHOR
Amarnath Murthy, Dec 15 2003
EXTENSIONS
Edited and extended by David Wasserman, Feb 14 2006
STATUS
approved