A097929 Numbers in base 10 that are palindromic in bases 4 and 5.

0, 1, 2, 3, 46, 9222, 76449, 193662, 2347506, 2593206, 17099841, 17402241, 25651017, 32317933, 16516113567, 16619231967, 155784877126, 2806999337418, 3101308506654, 37004798195346, 47470618709562, 48517516968462

Offset

1,3

Comments

Intersection of A014192 and A029952. - Michel Marcus, Oct 09 2014

Links

Ray Chandler, Table of n, a(n) for n = 1..26 (terms < 10^18)

Cino Hilliard, util.gp PARI Functions not in the PARI Library. [broken link]

Cino Hilliard, Pari Utilities (cached)

Example

9222 base 10 is 2100012 base 4 and 9222 base 10 is 243342 base 5.

Mathematica

Do[ p4 = IntegerDigits[n, 4]; If[ FromDigits[ Reverse[ p4]] == FromDigits[p4], p5 = IntegerDigits[n, 5]; If[ FromDigits[ Reverse[p5]] == FromDigits[p5], Print[n]]], {n, 2*10^7}] (* Robert G. Wilson v, Sep 07 2004 *)

Prog

(PARI) /* Requires reading the util.gp file in the link into the gp session. */
palbase(n, b1, b2) = { for(x=1, n, if(ispal(base(10, b1, x))& ispal(base(10, b2, x)), print1(x", ")) ) }

Crossrefs

Cf. A014192 (base 4), A029952 (base 5).

Sequence in context: A289661 A191996 A171079 * A266512 A041501 A163488

Adjacent sequences: A097926 A097927 A097928 * A097930 A097931 A097932

Keyword

base,nonn

Author

Cino Hilliard, Sep 04 2004

Extensions

More terms from Robert G. Wilson v, Sep 07 2004

a(15)-a(22) from Donovan Johnson, Apr 23 2010

Status

approved