# A113329 (b-file synthesized from sequence entry)
0 1
1 4
2 32
3 272
4 2400
5 21792
6 203008
7 1940224
8 19065344
9 193410560
10 2038078464
11 22490167296
12 262429339648
13 3271314362368
14 43955391856640
15 640254018879488
16 10121874150653952
17 173145693892509696
18 3186234896556752896