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A158642 Palindromic numbers which are the product of a number n and its reversal (n written backwards) 2
0, 1, 4, 9, 121, 252, 484, 10201, 12321, 14641, 20502, 23632, 26962, 40804, 44944, 1002001, 1113111, 1226221, 1234321, 1357531, 2005002, 2126212, 2216122, 2249422, 2347432, 2429242, 4008004, 4229224, 100020001 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
Apart from 3 which produces 9 (3*3), all the other numbers n which satisfy the definition are formed by digits 0, 1 and 2 only. Subset of A002113.
Every term has an odd number of digits. - Floris van Doorn, Sep 25 2009
LINKS
Floris P. van Doorn, Table of n, a(n) for n=0,...,10126 (every term with at most 27 digits)
EXAMPLE
0*0=0; 1*1=1; 2*2=4; 3*3=9; 11*11=121; 12*21=252; 22*22=484; 101*101=10201; 102*201=20502; etc.
CROSSREFS
Sequence in context: A115676 A115667 A229971 * A131760 A002779 A028817
KEYWORD
easy,nonn,base
AUTHOR
EXTENSIONS
Corrected by Floris P. van Doorn, Sep 25 2009
STATUS
approved

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Last modified March 18 22:29 EDT 2024. Contains 370951 sequences. (Running on oeis4.)