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A060947 Intrinsic 10-palindromes: n is an intrinsic k-palindrome if it is a k-digit palindrome in some base. 10
513, 561, 585, 633, 645, 693, 717, 765, 771, 819, 843, 891, 903, 951, 975, 1023, 19684, 20008, 20332, 20440, 20764, 21088, 21196, 21520, 21844, 21880, 22204, 22528, 22636, 22960, 23284, 23392, 23716, 24040, 24076, 24400, 24724, 24832 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See A060873 for more information.
LINKS
MATHEMATICA
testQ[n_, k_] := For[b = 2, b <= Ceiling[(n-1)^(1/(k-1))], b++, d = IntegerDigits[n, b]; If[Length[d] == k && d == Reverse[d], Return[True]]]; n0[k_] := 2^(k-1) + 1; Reap[Do[If[testQ[n, 10] === True, Print[n, " ", FromDigits[d], " b = ", b]; Sow[n]], {n, n0[10], 25000}]][[2, 1]] (* Jean-François Alcover, Nov 07 2014 *)
CROSSREFS
Sequence in context: A017553 A087931 A044879 * A182108 A066697 A076338
KEYWORD
nonn,base
AUTHOR
Harvey P. Dale, May 08 2001
STATUS
approved

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Last modified May 23 02:30 EDT 2024. Contains 372758 sequences. (Running on oeis4.)