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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 January 22 15:13 EST 2022. Contains 350481 sequences. (Running on oeis4.)