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A275295 Number of set partitions of [2n] with symmetric block size list of length eight. 2
1, 70, 4005, 219521, 11954993, 653625597, 35989579051, 1997232863281, 111698425867139, 6292920483661649, 356957345427055439, 20375264103726231304, 1169732275950521805077, 67508137728429209948117, 3914904903283946200635048, 228039200549822180269793411 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
LINKS
FORMULA
a(n) ~ 64^n / (20160*Pi^2*n^2). - Vaclav Kotesovec, Aug 02 2016
EXAMPLE
a(4) = 1: 1|2|3|4|5|6|7|8.
CROSSREFS
Bisection of column k=8 of A275281.
Sequence in context: A266739 A227273 A298463 * A306984 A292986 A064114
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 22 2016
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)