# A149877 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 14
4 42
5 140
6 480
7 1694
8 6160
9 22768
10 86119
11 329819
12 1276827
13 5009624
14 19807663
15 79034687
16 317771172
17 1284909978
18 5231953571
19 21409625876
20 88032238475
21 363768052841
22 1508700015910
23 6282877542186
24 26257507524764
25 110071406730840
26 462949380985458
27 1952358638292573
28 8255507414702459