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A090564
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Beginning with 2, least new prime such that the concatenation a(n), a(n-1), ...a(2), a(1), a(2), ...a(n) is prime.
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1
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2, 7, 3, 41, 13, 11, 139, 167, 73, 71, 313, 53, 3, 43, 431, 7, 227, 1021, 1097, 43, 149, 811, 3413, 163, 1571, 2551, 1607, 331, 1061, 991, 47, 1783, 1217, 223, 3251, 853, 797, 181, 4679, 337, 6779, 6793, 1811, 211, 251, 619, 1283, 811, 6047, 193, 443, 12853
(list; graph; refs; listen; history; internal format)
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