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A094633 as a simple table

n a(n)
0 2
1 1
2 9
3 20
4 77
5 231
6 774
7 2465
8 8037
9 25916
10 84009
11 271635
12 879382
13 2845181
14 9208089
15 29796580
16 96426037
17 312037551
18 1009780614
19 3267709225
20 10574544477
21 34219920076
22 110738027409
23 358355719995
24 1159663574102
25 3752749988581

[2,1,9,20,77,231,774,2465,8037,25916,84009,271635,
 879382,2845181,9208089,29796580,96426037,
 312037551,1009780614,3267709225,10574544477,
 34219920076,110738027409,358355719995,
 1159663574102,3752749988581]

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Last modified February 28 10:22 EST 2020. Contains 332323 sequences. (Running on oeis4.)