# A253093 (b-file synthesized from sequence entry)
0 1
1 -2
2 -2
3 -6
4 -24
5 -114
6 -606
7 -3486
8 -21258
9 -135582
10 -896046
11 -6095490
12 -42470280
13 -301938390
14 -2183873490
15 -16032229362
16 -119232361656
17 -896918310126
18 -6815685210078
19 -52262898201642
20 -404022890110872
21 -3146342571901278
22 -24666061437979938
23 -194550540203413314