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A083475
Consider the set of all the numbers n*k where 1 <= k <= n. Then a(n) = number of palindromic members of this set.
1
1, 2, 3, 2, 1, 1, 1, 1, 1, 0, 10, 0, 0, 0, 0, 0, 1, 1, 2, 0, 1, 6, 2, 0, 2, 2, 0, 2, 3, 0, 2, 0, 5, 2, 2, 2, 10, 2, 2, 0, 1, 1, 1, 4, 1, 2, 3, 1, 2, 0, 1, 1, 5, 0, 1, 1, 3, 4, 1, 0, 0, 2, 2, 1, 1, 6, 1, 2, 3, 0, 0, 0, 2, 6, 1, 0, 12, 2, 1, 0, 0, 1, 1, 2, 1, 0, 1, 9, 1, 0, 8, 1, 1, 1, 1, 4, 1, 1, 10, 0, 19, 0, 2, 1
OFFSET
1,2
COMMENTS
a(10k) = 0.
EXAMPLE
a(22) = 6 and the palindromes are 22,44,66,88,242,484.
a(26) = 2 and the palindromes are 494 and 676.
CROSSREFS
Cf. A083476.
Sequence in context: A346399 A339071 A358478 * A211994 A122402 A179008
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 03 2003
EXTENSIONS
More terms from David Wasserman, Nov 15 2004
STATUS
approved