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A206570 as a simple table

n a(n)
1 4
2 16
3 61
4 232
5 882
6 3353
7 12747
8 48460
9 184229
10 700378
11 2662606
12 10122349
13 38481829
14 146295209
15 556166085
16 2114359836
17 8038098037
18 30558194945
19 116172168341
20 441648229594
21 1679000758004
22 6383006556982
23 24266083569200

[4,16,61,232,882,3353,12747,48460,184229,700378,
 2662606,10122349,38481829,146295209,556166085,
 2114359836,8038098037,30558194945,116172168341,
 441648229594,1679000758004,6383006556982,
 24266083569200]

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Last modified May 19 18:35 EDT 2022. Contains 353847 sequences. (Running on oeis4.)