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A200464 as a simple table

n a(n)
1 4
2 10
3 26
4 69
5 181
6 455
7 1120
8 2794
9 6955
10 17254
11 42770
12 105825
13 262026
14 648672
15 1605786
16 3974375
17 9835789
18 24343416
19 60250311
20 149117782
21 369056036
22 913396093
23 2260628044
24 5594995167
25 13847440350
26 34272006253
27 84822308047
28 209933077581

[4,10,26,69,181,455,1120,2794,6955,17254,42770,
 105825,262026,648672,1605786,3974375,9835789,
 24343416,60250311,149117782,369056036,913396093,
 2260628044,5594995167,13847440350,34272006253,
 84822308047,209933077581]

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Last modified October 27 05:51 EDT 2020. Contains 338035 sequences. (Running on oeis4.)