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A090272
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Take each palindrome ending in 1, 3, 7, or 9 and find smallest prime formed by the digits of that palindrome, followed by a string of digits, followed by the palindrome again.
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2
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11, 313, 727, 919, 11311, 33533, 77377, 990599, 10101101, 1114111, 1212121, 1311131, 1411141, 1513151, 1611161, 1712171, 18102181, 1917191, 30301303, 3135313, 3233323, 3331333, 3439343, 35301353, 3635363, 3732373, 3836383
(list; graph; refs; listen; history; internal format)
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