|
| |
|
|
A057814
|
|
Number of partitions of an n-set into blocks of size >4.
|
|
4
| |
|
|
1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 127, 463, 1255, 3004, 6722, 140570, 1039260, 5371627, 23202077, 90048525, 814737785, 7967774337, 62895570839, 417560407223, 2455461090505, 18440499041402, 179627278800426, 1770970802250146
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,11
|
|
|
REFERENCES
| E. A. Enneking and J. C. Ahuja, Generalized Bell numbers, Fib. Quart., 14 (1976), 67-73.
|
|
|
FORMULA
| E.g.f.: exp(exp(x)-1-x-x^2/2-x^3/6-x^4/24)
|
|
|
MAPLE
| G:={P=Set(Set(Atom, card>=5))}:combstruct[gfsolve](G, labeled, x):seq(combstruct[count]([P, G, labeled], size=i), i=0..27); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 16 2007
|
|
|
CROSSREFS
| Cf. A000110, A000296, A006505, A057837.
Sequence in context: A082251 A142384 A129537 * A038646 A096523 A142736
Adjacent sequences: A057811 A057812 A057813 * A057815 A057816 A057817
|
|
|
KEYWORD
| easy,nice,nonn
|
|
|
AUTHOR
| Steven C. Fairgrieve (fsteven(AT)math.wvu.edu), Nov 06 2000
|
| |
|
|
