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A143982 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 10
6 20
7 36
8 64
9 120
10 240
11 496
12 1024
13 2080
14 4160
15 8255
16 16368
17 32504
18 64464
19 126940
20 246640
21 470536
22 879056
23 1607862
24 2886800
25 5117800
26 9046960
27 16166475
28 29666676
29 56666754
30 113330260
31 236315636
32 507817728
33 1109184992
34 2433554624
35 5318390075

[0,0,1,4,10,20,36,64,120,240,496,1024,2080,4160,
 8255,16368,32504,64464,126940,246640,470536,
 879056,1607862,2886800,5117800,9046960,16166475,
 29666676,56666754,113330260,236315636,507817728,
 1109184992,2433554624,5318390075]

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Last modified June 6 16:10 EDT 2024. Contains 373133 sequences. (Running on oeis4.)