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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 Cf. A002113 Sequence in context: A115676 A115667 A229971 * A131760 A002779 A028817 Adjacent sequences:  A158639 A158640 A158641 * A158643 A158644 A158645 KEYWORD easy,nonn,base AUTHOR Paolo P. Lava and Giorgio Balzarotti, Mar 23 2009 EXTENSIONS Corrected by Floris P. van Doorn, Sep 25 2009 STATUS approved

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Last modified March 31 16:23 EDT 2020. Contains 333151 sequences. (Running on oeis4.)