OFFSET
1,1
COMMENTS
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10000 (first 1000 terms from T. D. Noe)
Attila Bérczes and Volker Ziegler, On simultaneous palindromes, arXiv 1403.0787 [math.NT], 2014.
Edray Herber Goins, Palindromes in different bases: a conjecture of J. Ernest Wilkins, Integers, Vol. 9 (2009), A55.
FORMULA
A050812(a(n)) = 2.
EXAMPLE
15 is palindromic in bases 2 and 4: 15 = 1111_2 = 33_4.
MATHEMATICA
n = -1; t = {}; While[Length[t] < 100, n++; If[Count[Table[s = IntegerDigits[n, m]; s == Reverse[s], {m, 2, 10}], True] == 2, AppendTo[t, n]]]; t
PROG
(PARI) pal(v)=v==Vecrev(v)
is(n)=sum(b=2, 10, pal(digits(n, b)))==2 \\ Charles R Greathouse IV, Mar 05 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
T. D. Noe, Jul 18 2012
STATUS
approved