# A007214 (b-file synthesized from sequence entry)
0 1
1 0
2 3
3 2
4 12
5 24
6 80
7 222
8 687
9 2096
10 6585
11 20892
12 67216
13 218412
14 716304
15 2367696
16 7881381
17 26398728
18 88918451
19 301014786
20 1023681792
21 3495786472
22 11983194420
23 41220422022
24 142247592803
25 492339048156
26 1708741395441
27 5945617039980
28 20737219258440
29 72488490389592