# A149928 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 48
5 166
6 597
7 2215
8 8510
9 33266
10 132505
11 537363
12 2202785
13 9140543
14 38334918
15 162006061
16 690358870
17 2962720562
18 12787564112
19 55521222256
20 242295294818
21 1062048148918
22 4675861534171
23 20666381911613
24 91659316769501
25 407917282709291
26 1820948836147556
27 8151519838832373