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Palindromes of the form 4n + 1 where n is also a palindrome. Palindromes arising in A083831.
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%I #10 Apr 06 2017 12:07:15

%S 5,9,33,353,525,565,929,969,3553,35553,52125,52525,52925,56165,56565,

%T 56965,92129,92529,92929,96169,96569,96969,355553,3555553,5212125,

%U 5216125,5252525,5256525,5292925,5296925,5612165,5616165,5652565

%N Palindromes of the form 4n + 1 where n is also a palindrome. Palindromes arising in A083831.

%t 4#+1&/@Select[Range[1500000],AllTrue[{#,4#+1},PalindromeQ]&] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Apr 06 2017 *)

%Y Cf. A083829, A083830, A083831.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 09 2003

%E Corrected and extended by _Ray Chandler_, May 21 2003