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A091679
In base 4, numbers n not of the form k + reverse(k) for any k.
2
1, 3, 7, 8, 9, 11, 12, 13, 14, 16, 18, 19, 21, 22, 23, 24, 26, 27, 28, 29, 31, 32, 35, 36, 37, 38, 39, 40, 43, 44, 45, 46, 47, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 62, 63, 64, 66, 69, 70, 71, 72, 73, 74, 77, 78, 79, 80, 81, 82, 83, 86, 87, 88, 89, 90, 91, 94, 95, 96, 97, 98
OFFSET
0,2
COMMENTS
Base-4 analog of A067031. Complement of A091678.
EXAMPLE
31 is a term since 31 (decimal) = 133 and there is no k such that k + reverse(k) = 133 in base 4.
CROSSREFS
Sequence in context: A181828 A328980 A059101 * A116034 A364166 A122987
KEYWORD
base,easy,nonn
AUTHOR
Klaus Brockhaus, Jan 28 2004
STATUS
approved