# A370480 (b-file synthesized from sequence entry)
0 1
1 3
2 15
3 73
4 360
5 1800
6 9112
7 46632
8 240936
9 1255336
10 6589080
11 34811784
12 184990568
13 988156872
14 5303039256
15 28579068520
16 154605138984
17 839272725864
18 4570409517848
19 24961191298248
20 136688674353000
21 750355591919240
22 4128471397725336
23 22762905189252264