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A090260
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Beginning with 1, distinct numbers such that concatenation a(n+1), a(n), a(n+1) is a prime.
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1
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1, 3, 11, 13, 17, 7, 111, 23, 9, 19, 27, 43, 33, 29, 31, 41, 37, 21, 53, 51, 47, 39, 73, 107, 49, 59, 57, 61, 71, 63, 79, 77, 67, 87, 97, 81, 89, 103, 69, 109, 93, 113, 99, 1019, 123, 131, 117, 101, 1017, 139, 173, 91, 137, 171, 127, 143, 141, 83, 181, 119, 151, 129, 133
(list; graph; refs; listen; history; internal format)
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