login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A275292 Number of set partitions of [n] with symmetric block size list of length nine. 2
1, 5, 95, 575, 7175, 49091, 513206, 3800358, 36298007, 282835456, 2571177913, 20702222482, 183079272792, 1505743012484, 13114463722858, 109381638489849, 944974537003694, 7956650229728706, 68468581589476475, 580345660548809882, 4986413617279183229 (list; graph; refs; listen; history; text; internal format)
OFFSET
9,2
LINKS
FORMULA
a(n) ~ 9^n / (71680*Pi^2*n^2). - Vaclav Kotesovec, Aug 02 2016
EXAMPLE
a(10) = 5: 1|2|3|4|56|7|8|9|(10), 1|2|3|4|57|6|8|9|(10), 1|2|3|4|58|6|7|9|(10), 1|2|3|4|59|6|7|8|(10), 1|2|3|4|5(10)|6|7|8|9.
CROSSREFS
Column k=9 of A275281.
Sequence in context: A054205 A116290 A274874 * A362481 A359271 A363844
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 22 2016
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 19 06:32 EDT 2024. Contains 370953 sequences. (Running on oeis4.)