login

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”).

A063756
Number of groups of order <= n.
7
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
1,2
LINKS
Andrey Zabolotskiy, Table of n, a(n) for n = 1..2047 [terms a(1)-a(1023) from Eric M. Schmidt]
MATHEMATICA
Table[Sum[FiniteGroupCount[k], {k, 1, n}], {n, 1, 57}] (* Geoffrey Critzer, Feb 06 2013 *)
CROSSREFS
Partial sums of A000001, which is the main entry for this sequence.
Sequence in context: A354852 A153775 A173666 * A358291 A117522 A299101
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 14 2001
STATUS
approved