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A083717
(Greatest prime <= n) * (greatest prime factor of n).
4
1, 4, 9, 6, 25, 15, 49, 14, 21, 35, 121, 33, 169, 91, 65, 26, 289, 51, 361, 95, 133, 209, 529, 69, 115, 299, 69, 161, 841, 145, 961, 62, 341, 527, 217, 93, 1369, 703, 481, 185, 1681, 287, 1849, 473, 215, 989, 2209, 141, 329, 235, 799, 611, 2809, 159, 583, 371
OFFSET
1,2
COMMENTS
a(n) = A007917(n)*A006530(n);
Terms of A001358; A001248 is a subsequence.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, May 04 2003
STATUS
approved