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A085893 Group the natural numbers such that the product of the n-th group has n prime divisors. (1), (2), (3,4), (5,6,),(7,8,9,10),(11,12,13,14),(15,16,17,18,19,20,21),... Sequence contains the number of terms in the groups. 2

%I

%S 1,1,2,2,4,4,7,7,7,8,10,12,11,13,14,15,19,16,19,18,21,19,24,24,24,26,

%T 27,28,29,31,29,33,33,35,37,37,38,38,41,39,45,44,45,44,49,47,52,48,52,

%U 52,56,52,53,60,59,58,59,65,64,61,65,63,70,70,70,68,73,75,71,76,75,79,78

%N Group the natural numbers such that the product of the n-th group has n prime divisors. (1), (2), (3,4), (5,6,),(7,8,9,10),(11,12,13,14),(15,16,17,18,19,20,21),... Sequence contains the number of terms in the groups.

%Y Cf. A085892, A085894.

%K nonn

%O 0,3

%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 10 2003

%E More terms from _Ray Chandler_, Sep 13 2003

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Last modified May 9 06:30 EDT 2021. Contains 343692 sequences. (Running on oeis4.)