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 A229877 Palindromic prime numbers == 1 (mod 9). 1
 181, 757, 919, 12421, 16561, 18181, 19891, 30403, 34543, 35353, 70507, 71317, 77977, 78787, 95959, 96769, 97579, 98389, 1008001, 1065601, 1114111, 1163611, 1196911, 1212121, 1245421, 1253521, 1278721, 1286821, 1327231, 1335331, 1343431, 1409041, 1490941 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Shyam Sunder Gupta, Table of n, a(n) for n = 1..1005 MATHEMATICA t = {}; Do[z = n*10^(IntegerLength[n] - 1) + FromDigits@Rest@Reverse@IntegerDigits[n]; If[PrimeQ[z] && Mod[z, 9] == 1, AppendTo[t, z]], {n, 1, 99999}]; t Select[Prime[Range[115000]], PalindromeQ[#]&&Mod[#, 9]==1&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 15 2021 *) CROSSREFS Cf. A002385, A229875. Sequence in context: A253821 A154628 A142731 * A067383 A107255 A163442 Adjacent sequences:  A229874 A229875 A229876 * A229878 A229879 A229880 KEYWORD nonn,base,less AUTHOR Shyam Sunder Gupta, Oct 02 2013 STATUS approved

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Last modified August 13 05:16 EDT 2022. Contains 356077 sequences. (Running on oeis4.)