A297227 - OEIS

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A297227 as a simple table

n	a(n)
1	1
2	41
3	196
4	751
5	5570
6	33158
7	178469
8	1051514
9	6152761
10	35360059
11	204610794
12	1185387515
13	6858428469
14	39687403360
15	229672443463
16	1329125857816
17	7691795163442
18	44512304299166
19	257592990212772
20	1490702456602803

[1,41,196,751,5570,33158,178469,1051514,6152761, 35360059,204610794,1185387515,6858428469, 39687403360,229672443463,1329125857816, 7691795163442,44512304299166,257592990212772, 1490702456602803]