# A149376 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 48
5 165
6 711
7 2765
8 12230
9 50199
10 227229
11 970714
12 4459345
13 19565405
14 90903964
15 406827818
16 1906585122
17 8662077597
18 40874264328
19 187908308360
20 891647946915
21 4138130214503
22 19726740618496
23 92263851819229
24 441537841755276
25 2078452663508263
26 9979603884251570
27 47232397814709432