A063756 Number of groups of order <= n.

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, 78, 83, 87, 88, 92, 93, 144, 145, 147, 148, 162, 163, 165, 167, 181, 182, 188, 189, 193, 195, 197, 198, 250, 252, 257, 258, 263, 264, 279, 281, 294, 296

Offset: 1

Author

N. J. A. Sloane, Aug 14 2001

Keywords

• nonn

Links

• Andrey Zabolotskiy, Table of n, a(n) for n = 1..2047 [terms a(1)-a(1023) from Eric M. Schmidt]

Crossrefs

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

Programs

Mathematica

Table[Sum[FiniteGroupCount[k],{k,1,n}],{n,1,57}] (* Geoffrey Critzer, Feb 06 2013 *)