A143749 - OEIS

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A143749 as a simple table

n	a(n)
0	0
1	1
2	10
3	110
4	1310
5	16610
6	221010
7	3051510
8	43357110
9	630098810
10	9324499610
11	140046944510
12	2129440330510
13	32716182966610
14	507115641523810
15	7920881045935110
16	124548017695545510
17	1969917348711212010

[0,1,10,110,1310,16610,221010,3051510,43357110, 630098810,9324499610,140046944510,2129440330510, 32716182966610,507115641523810,7920881045935110, 124548017695545510,1969917348711212010]