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A091897
Numbers that remain prime or composite for all permutations of their digits.
2
2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 17, 18, 21, 22, 24, 25, 26, 27, 28, 31, 33, 36, 37, 39, 40, 42, 44, 45, 46, 48, 49, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 71, 72, 73, 75, 77, 78, 79, 80, 81, 82, 84, 85, 86, 87, 88, 90, 93, 94, 96, 97, 99, 102, 105
OFFSET
1,1
COMMENTS
Union of A003459 and A067012. The repdigit numbers (A010785) > 1 are also clearly a subsequence.
CROSSREFS
Cf. A003459 (absolute primes), A067012 ('absolute composites'), A091898 (complement of A091897), A010785 (repdigit numbers).
Sequence in context: A318735 A002244 A037173 * A055201 A213006 A068998
KEYWORD
base,nonn
AUTHOR
Rick L. Shepherd, Feb 09 2004
STATUS
approved