# A213296 (b-file synthesized from sequence entry)
0 1
1 8
2 64
3 428
4 2556
5 13224
6 60600
7 250062
8 977026
9 3754472
10 14486158
11 56109736
12 220213038
13 875120922
14 3539254104
15 14534439529
16 60794185555
17 258385808222
18 1118113946883
19 4915589687030
20 21983704654711
21 99825770573061
22 460645444681024
23 2156595097630195