# A180567 (b-file synthesized from sequence entry)
0 0
1 0
2 4
3 18
4 96
5 374
6 1380
7 4696
8 15336
9 48318
10 148448
11 446890
12 1324104
13 3872656
14 11206764
15 32143818
16 91509120
17 258855006
18 728211180
19 2038815272
20 5684262480
21 15789141750
22 43712852544
23 120663667538
24 332191809936
25 912339490464