# A149150 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 38
5 111
6 491
7 1619
8 7448
9 26306
10 123930
11 459055
12 2191280
13 8408836
14 40486937
15 159582815
16 773367694
17 3112854417
18 15160540050
19 62063629949
20 303427184699
21 1259618217221
22 6176936899574
23 25944142838499
24 127538542044858
25 541041116351226
26 2665083280305249
27 11403091715885735
28 56264553278451650