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A292350 as a simple table

n a(n)
1 0
2 9
3 116
4 670
5 2580
6 7735
7 19544
8 43596
9 88440
10 166485
11 295020
12 497354
13 804076
14 1254435
15 1897840
16 2795480
17 4022064
18 5667681
19 7839780
20 10665270
21 14292740
22 18894799
23 24670536
24 31848100
25 40687400
26 51482925
27 64566684
28 80311266
29 99133020
30 121495355
31 147912160

[0,9,116,670,2580,7735,19544,43596,88440,166485,
 295020,497354,804076,1254435,1897840,2795480,
 4022064,5667681,7839780,10665270,14292740,
 18894799,24670536,31848100,40687400,51482925,
 64566684,80311266,99133020,121495355,147912160]

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Last modified September 19 14:14 EDT 2020. Contains 337178 sequences. (Running on oeis4.)