# A151248 (b-file synthesized from sequence entry)
0 1
1 4
2 17
3 77
4 359
5 1702
6 8165
7 39490
8 192131
9 939016
10 4605451
11 22650627
12 111651643
13 551379076
14 2727090199
15 13505347559
16 66955102057
17 332249446722
18 1650027506813
19 8200076776267
20 40776104773443
21 202872003528704
22 1009809751924771
23 5028455914303228
24 25048822763861523
25 124818886054490310