# A294036 (b-file synthesized from sequence entry)
0 1
1 4
2 16
3 64
4 280
5 1504
6 9856
7 70144
8 498136
9 3449440
10 23506816
11 160566784
12 1115048896
13 7905796864
14 56994288640
15 414928113664
16 3034880623576
17 22255957312864
18 163667338903936
19 1208070406612480
20 8955840250934080
21 66678657938510080