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A003063 as a simple table

n a(n)
1 -1
2 -1
3 1
4 11
5 49
6 179
7 601
8 1931
9 6049
10 18659
11 57001
12 173051
13 523249
14 1577939
15 4750201
16 14283371
17 42915649
18 128878019
19 386896201
20 1161212891
21 3484687249
22 10456158899
23 31372671001
24 94126401611
25 282395982049
26 847221500579
27 2541731610601
28 7625329049531
29 22876255584049

[-1,-1,1,11,49,179,601,1931,6049,18659,57001,
 173051,523249,1577939,4750201,14283371,42915649,
 128878019,386896201,1161212891,3484687249,
 10456158899,31372671001,94126401611,282395982049,
 847221500579,2541731610601,7625329049531,
 22876255584049]

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Last modified June 22 16:01 EDT 2021. Contains 345386 sequences. (Running on oeis4.)