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A231144 as a simple table

n a(n)
1 18
2 100
3 100
4 570
5 1470
6 570
7 3234
8 22870
9 22870
10 3234
11 18376
12 352444
13 966000
14 352444
15 18376
16 104386
17 5441634
18 40511376
19 40511376
20 5441634
21 104386
22 593022
23 83985430
24 1701515682
25 4626094668
26 1701515682
27 83985430
28 593022
29 3368932

[18,100,100,570,1470,570,3234,22870,22870,3234,
 18376,352444,966000,352444,18376,104386,5441634,
 40511376,40511376,5441634,104386,593022,83985430,
 1701515682,4626094668,1701515682,83985430,593022,
 3368932]

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Last modified September 20 12:05 EDT 2021. Contains 347586 sequences. (Running on oeis4.)