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A083717 (Greatest prime <= n) * (greatest prime factor of n). 4

%I #4 Mar 30 2012 18:50:34

%S 1,4,9,6,25,15,49,14,21,35,121,33,169,91,65,26,289,51,361,95,133,209,

%T 529,69,115,299,69,161,841,145,961,62,341,527,217,93,1369,703,481,185,

%U 1681,287,1849,473,215,989,2209,141,329,235,799,611,2809,159,583,371

%N (Greatest prime <= n) * (greatest prime factor of n).

%C a(n) = A007917(n)*A006530(n);

%C Terms of A001358; A001248 is a subsequence.

%Y Cf. A083715, A083716, A083714 A083718.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, May 04 2003

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Last modified May 5 16:17 EDT 2024. Contains 372275 sequences. (Running on oeis4.)