# A149397 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 50
5 195
6 827
7 3585
8 15764
9 71022
10 322598
11 1482669
12 6877055
13 32084238
14 150742341
15 711466035
16 3372971269
17 16054465033
18 76651185239
19 367106936232
20 1762594451696
21 8482453891493
22 40907555444259
23 197641305673999
24 956529488207506
25 4636375763142732
26 22504348920193826
27 109373806251584206