A263966 - OEIS

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A263966 as a simple table

n	a(n)
1	9
2	141
3	2089
4	23841
5	283641
6	3408145
7	40723017
8	484847873
9	5770449785
10	68675639729
11	817318275497
12	9726917755361
13	115759353325657
14	1377648247909137
15	16395387308054025
16	195121651065350465
17	2322144975436013241

[9,141,2089,23841,283641,3408145,40723017, 484847873,5770449785,68675639729,817318275497, 9726917755361,115759353325657,1377648247909137, 16395387308054025,195121651065350465, 2322144975436013241]