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A320755 as a simple table

n a(n)
0 1
1 9
2 46
3 175
4 551
5 1517
6 3775
7 8677
8 18703
9 38223
10 74682
11 140403
12 255280
13 450734
14 775440
15 1303509
16 2146040
17 3467254
18 5506807
19 8610369
20 13271183
21 20186110
22 30330668
23 45058828
24 66234905
25 96406840
26 139032605
27 198774473
28 281879613
29 396670035
30 554170514
31 768909964

[1,9,46,175,551,1517,3775,8677,18703,38223,74682,
 140403,255280,450734,775440,1303509,2146040,
 3467254,5506807,8610369,13271183,20186110,
 30330668,45058828,66234905,96406840,139032605,
 198774473,281879613,396670035,554170514,768909964]

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Last modified October 28 17:55 EDT 2021. Contains 348329 sequences. (Running on oeis4.)