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A121302 as a simple table

n a(n)
1 1
2 1
3 4
4 10
5 28
6 75
7 202
8 540
9 1440
10 3828
11 10153
12 26875
13 71021
14 187421
15 494013
16 1300844
17 3422509
18 8998118
19 23642479
20 62088032
21 162978242
22 427648023
23 1121766397
24 2941697012
25 7712415568
26 20215976824
27 52981414253
28 138831400836

[1,1,4,10,28,75,202,540,1440,3828,10153,26875,
 71021,187421,494013,1300844,3422509,8998118,
 23642479,62088032,162978242,427648023,1121766397,
 2941697012,7712415568,20215976824,52981414253,
 138831400836]

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Last modified April 5 13:25 EDT 2020. Contains 333241 sequences. (Running on oeis4.)