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A148986 as a simple table

n a(n)
0 1
1 1
2 3
3 9
4 32
5 116
6 433
7 1722
8 6768
9 27864
10 114906
11 482856
12 2051402
13 8779365
14 37984161
15 164983753
16 723206092
17 3179353568
18 14074287365
19 62502008249
20 278853312329
21 1248507623957
22 5607259480822
23 25269801560590
24 114141562007829
25 517150559088576
26 2347552285137891
27 10684056204974467
28 48710043328677984

[1,1,3,9,32,116,433,1722,6768,27864,114906,482856,
 2051402,8779365,37984161,164983753,723206092,
 3179353568,14074287365,62502008249,278853312329,
 1248507623957,5607259480822,25269801560590,
 114141562007829,517150559088576,2347552285137891,
 10684056204974467,48710043328677984]

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Last modified July 19 13:29 EDT 2024. Contains 374394 sequences. (Running on oeis4.)