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A155240 as a simple table

n a(n)
3 1
4 7
5 25
6 55
7 208
8 1905
9 20926
10 172576
11 1900996
12 35023141
13 893053190
14 24012955958
15 788590457332
16 36088248750672

[1,7,25,55,208,1905,20926,172576,1900996,35023141,
 893053190,24012955958,788590457332,36088248750672]

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Last modified January 31 20:46 EST 2023. Contains 359981 sequences. (Running on oeis4.)