# A019190 (b-file synthesized from sequence entry)
3 0
4 0
5 4
6 6
7 4
8 14
9 60
10 90
11 216
12 630
13 1496
14 3382
15 9144
16 22952
17 57168
18 147708
19 386212
20 997816
21 2608600
22 6894104
23 18203272
24 48193590
25 128294936
26 342193010
27 913922604
28 2447360528
29 6566442000
30 17642534388
31 47481137536