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A247188 as a simple table

n a(n)
0 0
1 0
2 0
3 3
4 9
5 22
6 49
7 104
8 215
9 438
10 885
11 1780
12 3571
13 7154
14 14321
15 28656
16 57327
17 114670
18 229357
19 458732
20 917483
21 1834986
22 3669993
23 7340008
24 14680039
25 29360102
26 58720229
27 117440484
28 234880995
29 469762018
30 939524065
31 1879048160
32 3758096351
33 7516192734
34 15032385501
35 30064771036
36 60129542107

[0,0,0,3,9,22,49,104,215,438,885,1780,3571,7154,
 14321,28656,57327,114670,229357,458732,917483,
 1834986,3669993,7340008,14680039,29360102,
 58720229,117440484,234880995,469762018,939524065,
 1879048160,3758096351,7516192734,15032385501,
 30064771036,60129542107]

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Last modified May 20 20:15 EDT 2022. Contains 353876 sequences. (Running on oeis4.)