# A149469 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 54
5 214
6 919
7 3984
8 17772
9 80080
10 366595
11 1691770
12 7877604
13 36926470
14 174112034
15 824899323
16 3925561729
17 18748361538
18 89833469739
19 431690857897
20 2079682186282
21 10041508850305
22 48584193517259
23 235491620594297
24 1143330270479493
25 5559375459322033
26 27068814795311369
27 131963539891053946