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A264578 as a simple table

n a(n)
1 0
2 4
3 4
4 6
5 25
6 68
7 112
8 281
9 856
10 1674
11 3988
12 10508
13 23724
14 55897
15 136144
16 325584
17 765361
18 1829400
19 4401652
20 10407276
21 24816024
22 59395330
23 141247593
24 336608388
25 803177056
26 1914674361
27 4562063424
28 10876904302
29 25937972164
30 61813285608

[0,4,4,6,25,68,112,281,856,1674,3988,10508,23724,
 55897,136144,325584,765361,1829400,4401652,
 10407276,24816024,59395330,141247593,336608388,
 803177056,1914674361,4562063424,10876904302,
 25937972164,61813285608]

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Last modified January 17 16:58 EST 2022. Contains 350402 sequences. (Running on oeis4.)