Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%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