A212022 - OEIS

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A212022 as a simple table

n	a(n)
1	0
2	2
3	25
4	346
5	2589
6	12636
7	46612
8	141520
9	372416
10	878329
11	1899446
12	3828397
13	7278790
14	13174461
15	22863219
16	38259181
17	62018107
18	97750460
19	150277231
20	225933884
21	332928091
22	481757242
23	685692030

[0,2,25,346,2589,12636,46612,141520,372416,878329, 1899446,3828397,7278790,13174461,22863219, 38259181,62018107,97750460,150277231,225933884, 332928091,481757242,685692030]