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Number of groups of order <= n.
7

%I #19 Mar 23 2024 11:38:06

%S 1,2,3,5,6,8,9,14,16,18,19,24,25,27,28,42,43,48,49,54,56,58,59,74,76,

%T 78,83,87,88,92,93,144,145,147,148,162,163,165,167,181,182,188,189,

%U 193,195,197,198,250,252,257,258,263,264,279,281,294,296

%N Number of groups of order <= n.

%H Andrey Zabolotskiy, <a href="/A063756/b063756.txt">Table of n, a(n) for n = 1..2047</a> [terms a(1)-a(1023) from Eric M. Schmidt]

%t Table[Sum[FiniteGroupCount[k],{k,1,n}],{n,1,57}] (* _Geoffrey Critzer_, Feb 06 2013 *)

%Y Partial sums of A000001, which is the main entry for this sequence.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Aug 14 2001