# A378733 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 18
4 96
5 551
6 3332
7 20906
8 134820
9 888151
10 5951096
11 40432550
12 277892604
13 1928668910
14 13497833600
15 95150192558
16 674993798716
17 4815149310441
18 34519885929860
19 248571425473698
20 1797058507267104
21 13038781500215352
22 94914559729835580
23 692987915940266152