A083830 Palindromes of the form 3n + 1 where n is also a palindrome: palindromes arising in A083829.

4, 7, 22, 232, 424, 454, 484, 727, 757, 787, 2332, 23332, 42124, 42424, 42724, 45154, 45454, 45754, 48184, 48484, 48784, 72127, 72427, 72727, 75157, 75457, 75757, 78187, 78487, 78787, 233332, 2333332, 4212124, 4215124, 4218124, 4242424

Offset: 1

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 09 2003

Keywords

• base
• nonn

Crossrefs

Cf. A083829.

Programs

Mathematica

Select[3#+1&/@Select[Range[15*10^5],PalindromeQ],PalindromeQ] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 20 2020 *)

Extensions

Corrected and extended by Ray Chandler, May 21 2003