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Table of n, a(n) for n=1..27.
Cf. A152824 and A152834.
Sequence in context: A051962 A214492 A157999 * A142830 A160069 A201852
Adjacent sequences: A152850 A152851 A152852 * A152854 A152855 A152856
Zak Seidov, Dec 14 2008, Dec 26 2008