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
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