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A164990 as a simple table

n a(n)
1 1
2 2
3 4
4 10
5 22
6 52
7 114
8 260
9 564
10 1256
11 2698
12 5908
13 12588
14 27224
15 57620
16 123432
17 259816
18 552400
19 1157466
20 2446004
21 5105532
22 10735352
23 22334524
24 46766200
25 97021272
26 202431152
27 418935364
28 871425160
29 1799558584

[1,2,4,10,22,52,114,260,564,1256,2698,5908,12588,
 27224,57620,123432,259816,552400,1157466,2446004,
 5105532,10735352,22334524,46766200,97021272,
 202431152,418935364,871425160,1799558584]

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Last modified August 10 03:38 EDT 2022. Contains 356029 sequences. (Running on oeis4.)