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A083829 Palindromes n such that 3n + 1 is also a palindrome. 10
1, 2, 7, 77, 141, 151, 161, 242, 252, 262, 777, 7777, 14041, 14141, 14241, 15051, 15151, 15251, 16061, 16161, 16261, 24042, 24142, 24242, 25052, 25152, 25252, 26062, 26162, 26262, 77777, 777777, 1404041, 1405041, 1406041, 1414141, 1415141 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..37.

MATHEMATICA

Select[Range[15*10^5], AllTrue[{#, 3#+1}, PalindromeQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Feb 14 2018 *)

CROSSREFS

Cf. A083830.

Sequence in context: A266880 A320329 A083455 * A067963 A304980 A059406

Adjacent sequences:  A083826 A083827 A083828 * A083830 A083831 A083832

KEYWORD

base,nonn

AUTHOR

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

EXTENSIONS

Corrected and extended by Ray Chandler, May 21 2003

STATUS

approved

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Last modified January 27 04:57 EST 2020. Contains 331291 sequences. (Running on oeis4.)