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A058692
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B(n) - 1, B(n) = Bell numbers, A000110.
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5
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1, 4, 14, 51, 202, 876, 4139, 21146, 115974, 678569, 4213596, 27644436, 190899321, 1382958544, 10480142146, 82864869803, 682076806158, 5832742205056, 51724158235371, 474869816156750, 4506715738447322, 44152005855084345
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,2
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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
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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
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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]
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CROSSREFS
| A diagonal of A058710.
Sequence in context: A034743 A096241 A149488 * A165813 A198279 A099486
Adjacent sequences: A058689 A058690 A058691 * A058693 A058694 A058695
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 30 2000
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