|
Search: id:A027408
|
|
|
| A027408 |
|
Number of labeled servers of dimension 21. |
|
+0
1
|
|
| 1, 21, 651, 25151, 1141791, 58999227, 3398446177, 215000489757, 14773746912897, 1093126139653877, 86488314164428659, 7275617735214635079, 647633785826931486079, 60753264284081214177339
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
REFERENCES
|
R. Donaghey, Binomial self-inverse sequences and tangent coefficients, J. Combin. Theory, Series A, 21 (1976), 155-163.
|
|
FORMULA
|
E.g.f.: Exp[ Sum[ ((1+x)^i-1)/i, {i, 1, 21} ] ]
|
|
CROSSREFS
|
Sequence in context: A134499 A025752 A012501 this_sequence A020246 A006934 A100713
Adjacent sequences: A027405 A027406 A027407 this_sequence A027409 A027410 A027411
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Olivier Gerard (ogerard(AT)ext.jussieu.fr)
|
|
|
Search completed in 0.002 seconds
|
