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A259388

Palindromic numbers in bases 5 and 9 written in base 10.

0, 1, 2, 3, 4, 6, 109, 246, 282, 564, 701, 22386, 32152, 41667, 47653, 48553, 1142597, 1313858, 1412768, 1677684, 12607012902, 19671459008, 20134447808, 24208576998, 24863844904, 26358878059

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OFFSET

1,3

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..40

Index entries for sequences related to palindromes

FORMULA

Intersection of A029952 and A029955.

EXAMPLE

246 is in the sequence because 246_10 = 303_9 = 1441_5.

MATHEMATICA

(* first load nthPalindromeBase from A002113 *) palQ[n_Integer, base_Integer] := Block[{}, Reverse[ idn = IntegerDigits[n, base]] == idn]; k = 0; lst = {}; While[k < 21000000, pp = nthPalindromeBase[k, 9]; If[palQ[pp, 5], AppendTo[lst, pp]; Print[pp]]; k++]; lst

b1=5; b2=9; lst={}; Do[d1=IntegerDigits[n, b1]; d2=IntegerDigits[n, b2]; If[d1==Reverse[d1]&&d2==Reverse[d2], AppendTo[lst, n]], {n, 0, 10000000}]; lst (* Vincenzo Librandi, Jul 17 2015 *)

CROSSREFS

Cf. A007632, A007633, A029731, A029804, A029961, A029962, A029963, A029964, A029965, A029966, A029967, A029968, A029969, A029970, A048268, A060792, A097855, A097856, A097928, A097929, A097930, A097931, A099145, A099146, A099165, A182232, A182233, A182234, A250408, A250409, A250410, A250411, A250412, A259374, A259375, A259376, A259377, A259378, A249156, A259380, A259381, A259382, A259383, A259384, A259385, A259386, A259387, A259388, A259389, A259390.

Sequence in context: A051856 A135236 A029962 * A049010 A340100 A361396

Adjacent sequences: A259385 A259386 A259387 * A259389 A259390 A259391

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Jul 16 2015

STATUS

approved

URL: https://oeis.org/A259388

⇱ A259388 - OEIS