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A128376 Palindromic primes with only composite digits (i.e.,4,6,8,9). 1

%I #6 Dec 20 2018 14:11:37

%S 94649,94849,94949,96469,98689,9446449,9686869,9888889,9889889,

%T 9896989,9989899,944999449,946666649,946999649,948898849,964444469,

%U 964989469,966848669,968646869,968666869,968868869,968898869,968999869,986444689

%N Palindromic primes with only composite digits (i.e.,4,6,8,9).

%C Subsequence of A128375.

%t Select[Flatten[Table[FromDigits/@Tuples[{4,6,8,9},n],{n,9}]],PalindromeQ[ #] && PrimeQ[#]&] (* _Harvey P. Dale_, Dec 20 2018 *)

%Y Cf. A002385, A083185.

%K nonn,base,less

%O 1,1

%A _Lekraj Beedassy_, Feb 27 2007

%E Corrected by _Ray Chandler_, Feb 28 2007

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Last modified May 7 16:48 EDT 2024. Contains 372310 sequences. (Running on oeis4.)