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 A046807 Palindromes in factorial base. 6
 0, 1, 3, 7, 9, 11, 25, 33, 41, 121, 127, 133, 139, 147, 153, 159, 165, 173, 179, 185, 191, 721, 751, 781, 811, 843, 873, 903, 933, 965, 995, 1025, 1055, 5041, 5065, 5089, 5113, 5137, 5167, 5191, 5215, 5239, 5263, 5293, 5317, 5341, 5365, 5389, 5419, 5443, 5467 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Equivalently numbers n such that row n of A108731 is symmetric. - Rémy Sigrist, Mar 20 2018 LINKS Rémy Sigrist, Table of n, a(n) for n = 1..1000 Index entries for sequences related to factorial base representation Index entries for sequences related to palindromes EXAMPLE 41 = 1 4! + 2 3! + 2 2! + 1 1!. PROG (PARI) is(n) = my (d=[]); for (r=2, oo, if (n==0, return (Vecrev(d)==d), d=concat(n%r, d); n\=r)) \\ Rémy Sigrist, Mar 19 2018 CROSSREFS Cf. A108731. Sequence in context: A003538 A018596 A191181 * A333423 A178836 A338712 Adjacent sequences: A046804 A046805 A046806 * A046808 A046809 A046810 KEYWORD base,nonn AUTHOR Erich Friedman EXTENSIONS More terms from Floor van Lamoen, Oct 31 2001 Data corrected and initial 0 added by Rémy Sigrist, Mar 19 2018 STATUS approved

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)