# A007625 (b-file synthesized from sequence entry)
-1 1
0 2
1 8
2 64
3 904
4 20926
5 753994
6 40412530
7 3099627142
8 329518779600
9 47292630585258
10 8962444327321130
11 2200336508719464304
12 688212546598963025056
13 270220456234745707986648