# A090228 (b-file synthesized from sequence entry)
0 0
1 1
2 8
3 168
4 714
5 1870
6 7920
7 54288
8 229970
9 602070
10 2550408
11 10803704
12 28284465
13 74049690
14 193864606
15 821223648
16 3478759200
17 9107509825
18 23843770274
19 62423800998
20 264431464440
21 1120149658760
22 2932589879121
23 7677619978602