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A298648 as a simple table

n a(n)
3 1
4 4
5 30
6 12
7 98
8 28
9 270
10 60
11 682
12 124
13 1638
14 252
15 3810
16 508
17 8670
18 1020
19 19418
20 2044
21 42966
22 4092
23 94162
24 8188
25 204750
26 16380
27 442314
28 32764
29 950214
30 65532
31 2031554
32 131068
33 4325310
34 262140
35 9174970
36 524284
37 19398582
38 1048572
39 40894386
40 2097148
41 85983150

[1,4,30,12,98,28,270,60,682,124,1638,252,3810,508,
 8670,1020,19418,2044,42966,4092,94162,8188,204750,
 16380,442314,32764,950214,65532,2031554,131068,
 4325310,262140,9174970,524284,19398582,1048572,
 40894386,2097148,85983150]

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Last modified July 18 19:00 EDT 2019. Contains 325144 sequences. (Running on oeis4.)