# A140770 (b-file synthesized from sequence entry)
1 1
2 16
3 289
4 4624
5 67081
6 902500
7 11471769
8 139570596
9 1640493009
10 18754206916
11 209576262025
12 2298031637476
13 24798178969729
14 263962539461776
15 2776718023652329
16 28909790108979264
17 298278580556192769
18 3052900712959977636
19 31023767417676585561
20 313247762072931012804