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 A048343 Total number of distinct palindromes of form 'n-digit number' x 'n-digit number_reversed' (n-digit number not palindromic). 3
 0, 1, 3, 10, 19, 44, 86, 171, 308, 551, 920 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS EXAMPLE E.g., 3 solutions for 3-digit numbers: 102 * 201 = 20502; 112 * 211 = 23632; 122 * 221 = 26962. PROG (Python) def A048343(n): ....y, plist = 0, [] ....for i in range(10**(n-1), 10**n): ........s1 = str(i) ........s2 = s1[::-1] ........if s1 != s2: ............p = i*int(s2) ............if not p in plist: ................sp = str(p) ................if sp == sp[::-1]: ....................plist.append(p) ....................y += 1 ....return y # Chai Wah Wu, Sep 05 2014 CROSSREFS Cf. A048344. Sequence in context: A160002 A294421 A027177 * A056789 A174476 A098645 Adjacent sequences:  A048340 A048341 A048342 * A048344 A048345 A048346 KEYWORD nonn,base,more AUTHOR Patrick De Geest, Feb 15 1999 EXTENSIONS More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 18 2006 Offset changed and two terms added by Lars Blomberg, Nov 25 2011 STATUS approved

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Last modified May 19 14:48 EDT 2019. Contains 323395 sequences. (Running on oeis4.)