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Search: id:A083983
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| A083983 |
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If k is a number with exactly two distinct decimal digits, say a and b, neither of which is 0 (i.e. a member of A101594), define the self-complement of k, SC(k), to be the number obtained by replacing a with b and vice versa. E.g. SC(232233) = 323322. Sequence contains primes p such that SC(p) is also a prime. |
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7
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| 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 191, 199, 313, 331, 337, 773, 911, 919, 1171, 7717, 11113, 11119, 11177, 11717, 33331, 77171, 77711, 79999, 97777, 99991, 113111, 131111, 131113, 131311, 191999, 199999, 313133, 313331, 313333, 331333
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