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A229880
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Palindromic prime numbers == 7 (mod 9).
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1
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7, 151, 313, 727, 10501, 11311, 13831, 15451, 17971, 30103, 35053, 37573, 70207, 71917, 72727, 78487, 90709, 93139, 94849, 96469, 1062601, 1160611, 1177711, 1193911, 1201021, 1218121, 1242421, 1250521, 1422241, 1447441, 1463641, 1496941, 1520251, 1594951
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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t = {}; Do[z = n*10^(IntegerLength[n] - 1) + FromDigits@Rest@Reverse@IntegerDigits[n]; If[PrimeQ[z] && Mod[z, 9] == 7, AppendTo[t, z]], {n, 1, 99999}]; t
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CROSSREFS
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KEYWORD
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nonn,base,less
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AUTHOR
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STATUS
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approved
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