A030960 - OEIS

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A030960 as a simple table

n	a(n)
1	1
2	2
3	8
4	34
5	174
6	1047
7	7333
8	58665
9	527987
10	5279872
11	58078601
12	696943215
13	9060261802
14	126843665237
15	1902654978556
16	30442479656900
17	517522154167308
18	9315398775011558
19	176992576725219613
20	3539851534504392267

[1,2,8,34,174,1047,7333,58665,527987,5279872, 58078601,696943215,9060261802,126843665237, 1902654978556,30442479656900,517522154167308, 9315398775011558,176992576725219613, 3539851534504392267]