A098289 - OEIS

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A098289 as a simple table

n	a(n)
1	0
2	9
3	2
4	22
5	419
6	591
7	898
8	915
9	285
10	3618
11	10367
12	5396
13	1192
14	8251
15	13198
16	16050
17	47987
18	146191
19	2518028
20	7744270
21	16819386

[0,9,2,22,419,591,898,915,285,3618,10367,5396, 1192,8251,13198,16050,47987,146191,2518028, 7744270,16819386]