|
Search: id:A058692
|
|
| |
|
| 1, 4, 14, 51, 202, 876, 4139, 21146, 115974, 678569, 4213596, 27644436, 190899321, 1382958544, 10480142146, 82864869803, 682076806158, 5832742205056, 51724158235371, 474869816156750, 4506715738447322, 44152005855084345
(list; graph; listen)
|
|
|
OFFSET
|
2,2
|
|
|
LINKS
|
W. M. B. Dukes, Tables of matroids
W. M. B. Dukes, Counting and Probability in Matroid Theory, Ph.D. Thesis, Trinity College, Dublin, 2000.
W. M. B. Dukes, On the number of matroids on a finite set
Index entries for sequences related to matroids
|
|
MAPLE
|
a:=n->sum(stirling2(n, k), k=2..n): seq(a(n), n=2..23); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 28 2007
|
|
MATHEMATICA
|
f[n_] := Sum[ StirlingS2[n, k], {k, 2, n}]; Table[ f[n], {n, 2, 23}] - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 29 2007
Table[BellB[n, 1] - 1, {n, 2, 23}] [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 16 2009]
|
|
CROSSREFS
|
A diagonal of A058710.
Sequence in context: A034743 A096241 A149488 this_sequence A165813 A099486 A047033
Adjacent sequences: A058689 A058690 A058691 this_sequence A058693 A058694 A058695
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), Dec 30 2000
|
|
|
Search completed in 0.002 seconds
|
