The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A334140 Numbers that can be written as a product of distinct palindromes. 1

%I

%S 0,1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,18,20,21,22,24,27,28,30,32,33,

%T 35,36,40,42,44,45,48,54,55,56,60,63,64,66,70,72,77,80,84,88,90,96,99,

%U 101,105,108,110,111,112,120,121,126,131,132,135,140

%N Numbers that can be written as a product of distinct palindromes.

%H David A. Corneth, <a href="/A334140/b334140.txt">Table of n, a(n) for n = 1..10000</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PalindromicNumber.html">Palindromic Number</a>

%H <a href="/index/Pac#palindromes">Index entries for sequences related to palindromes</a>

%t ok[n_, w_: {}] := n <= 1 || AnyTrue[ Divisors@ n, ! MemberQ[w, #] && PalindromeQ[#] && ok[n/#, Append[w, #]] &]; Select[Range[0, 140], ok] (* _Giovanni Resta_, Apr 15 2020 *)

%Y Cf. A002113, A033620, A084034, A115683, A140332, A334131.

%K nonn,base

%O 1,3

%A _Ilya Gutkovskiy_, Apr 15 2020

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 12 10:29 EDT 2021. Contains 344946 sequences. (Running on oeis4.)