# A149371 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 46
5 161
6 679
7 2679
8 11335
9 46123
10 202969
11 861581
12 3802695
13 16362599
14 73645207
15 323694943
16 1459832206
17 6466787674
18 29501513081
19 132348273267
20 604673867966
21 2726426138913
22 12550493380399
23 57060735346881
24 262973859896489
25 1199843537998945
26 5558950506623078
27 25511445519043023