# A019194 (b-file synthesized from sequence entry)
3 0
4 0
5 2
6 8
7 4
8 26
9 54
10 126
11 258
12 770
13 1568
14 4030
15 9560
16 25381
17 58328
18 154310
19 382514
20 1002989
21 2515622
22 6687152
23 17226920
24 45770045
25 119696108
26 320324918
27 846684628
28 2271206729
29 6053095938
30 16284572288
31 43613979158