# A241683 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 2
4 12
5 50
6 220
7 882
8 3612
9 14450
10 58140
11 232562
12 931612
13 3726450
14 14911260
15 59645042
16 238602012
17 954408050
18 3817719580
19 15270878322
20 61083862812
21 244335451250
22 977343203100
23 3909372812402