A058390 - OEIS

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A058390 as a simple table

n	a(n)
0	1
1	5
2	53
3	458
4	3411
5	19865
6	95214
7	383714
8	1346183
9	4202086
10	11905966
11	31061806
12	75533056
13	172800689
14	374861365
15	775978710
16	1541027694
17	2949003213
18	5458806804
19	9805626744
20	17140511056

[1,5,53,458,3411,19865,95214,383714,1346183, 4202086,11905966,31061806,75533056,172800689, 374861365,775978710,1541027694,2949003213, 5458806804,9805626744,17140511056]