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A155354 as a simple table

n a(n)
6 1
7 3
8 7
9 13
10 21
11 54
12 165
13 638
14 2331
15 9005
16 38668
17 204465
18 1227713
19 8257094
20 59762784
21 487017754
22 4487006412
23 47257428230
24 557362552428

[1,3,7,13,21,54,165,638,2331,9005,38668,204465,
 1227713,8257094,59762784,487017754,4487006412,
 47257428230,557362552428]

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Last modified January 27 03:09 EST 2022. Contains 350601 sequences. (Running on oeis4.)