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A281536 as a simple table

n a(n)
1 1
2 104
3 2919
4 15624
5 52529
6 146956
7 385284
8 979866
9 2440042
10 5946178
11 14218134
12 33491002
13 77932633
14 179450414
15 409349989
16 926267006
17 2081273523
18 4647417316
19 10319376525
20 22798153410
21 50137931781
22 109808283414
23 239585399751

[1,104,2919,15624,52529,146956,385284,979866,
 2440042,5946178,14218134,33491002,77932633,
 179450414,409349989,926267006,2081273523,
 4647417316,10319376525,22798153410,50137931781,
 109808283414,239585399751]

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Last modified December 3 22:11 EST 2020. Contains 338920 sequences. (Running on oeis4.)