# A251180 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 11
4 59
5 376
6 2566
7 18646
8 141857
9 1120851
10 9141387
11 76635239
12 658411100
13 5784858465
14 51899580702
15 474971067333
16 4431203311040
17 42128438013171
18 408111843546201
19 4028707682556147
20 40534978365189110
21 415825232653264747
22 4350847058443120856
23 46450772334813948748