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A061322 as a simple table

n a(n)
0 2
1 6
2 15
3 40
4 140
5 924
6 24640
7 12415040
8 2408343949440
9 71606426901226335015040
10 51274803735606705472274088614112357905277056
11 21728144612603201307908899563300049012978385050783094682272184269369267136230071558272

[2,6,15,40,140,924,24640,12415040,2408343949440,
 71606426901226335015040,
 51274803735606705472274088614112357905277056,
 21728144612603201307908899563300049012978385050783\
 094682272184269369267136230071558272]

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Last modified September 22 17:39 EDT 2021. Contains 347607 sequences. (Running on oeis4.)