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A121184 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 16
6 50
7 160
8 476
9 1431
10 4203
11 12369
12 36129
13 105451
14 307179
15 893495
16 2598476
17 7545168

[0,0,1,4,16,50,160,476,1431,4203,12369,36129,
 105451,307179,893495,2598476,7545168]

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Last modified July 31 06:15 EDT 2021. Contains 346369 sequences. (Running on oeis4.)