# A352645 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 36
4 189
5 1068
6 6669
7 47568
8 363897
9 2976048
10 26422929
11 248498880
12 2464625205
13 25922981568
14 285884886933
15 3296418423552
16 39795656126193
17 499998631895808
18 6526830528863001
19 88493793850020864
20 1241919513823360941
21 18020032474632956928