login
A319595
Numbers in base 10 that are palindromic in bases 3, 7, and 9.
0
0, 1, 2, 4, 8, 40, 100, 164, 328, 400, 8200, 14762, 532900
OFFSET
1,3
COMMENTS
Intersection of A014190, A029954, and A029955.
No other terms < 10^17. It is likely that there are no more terms. - Chai Wah Wu, Mar 20 2020
EXAMPLE
400 = 112211_3 = 1111_7 = 484_9.
PROG
(Sage)
[n for n in (0..100000) if Word(n.digits(3)).is_palindrome() and Word(n.digits(7)).is_palindrome() and Word(n.digits(9)).is_palindrome()]
CROSSREFS
Cf. A014190 (base 3), A029954 (base 7), and A029955 (base 9).
Sequence in context: A018380 A058236 A259120 * A285632 A102918 A326951
KEYWORD
nonn,base,more
AUTHOR
Jeremias M. Gomes, Sep 23 2018
STATUS
approved