# A218183 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 4
4 19
5 108
6 646
7 4056
8 26355
9 175628
10 1193906
11 8246856
12 57716798
13 408391736
14 2916689516
15 20997741104
16 152218453443
17 1110202813836
18 8140864778810
19 59981252880360
20 443834410644618
21 3296876425605992
22 24575508928455572
23 183773880824034512