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A055902 as a simple table

n a(n)
6 1
7 13
8 106
9 615
10 2850
11 11087
12 37626
13 114177
14 315805
15 807520
16 1930600
17 4354140
18 9331560
19 19117980
20 37630440
21 71461368
22 131399829
23 234661713
24 408100330
25 692741335
26 1150092658
27 1870787919
28 2986277658
29 4684437485
30 7230182505

[1,13,106,615,2850,11087,37626,114177,315805,
 807520,1930600,4354140,9331560,19117980,37630440,
 71461368,131399829,234661713,408100330,692741335,
 1150092658,1870787919,2986277658,4684437485,
 7230182505]

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Last modified October 20 02:54 EDT 2019. Contains 328244 sequences. (Running on oeis4.)