# A207677 (b-file synthesized from sequence entry)
1 2
2 16
3 72
4 436
5 2310
6 11994
7 65564
8 379618
9 2306234
10 15546084
11 105736196
12 882008157
13 7460256028
14 79554888778
15 842718226878
16 10871887456045
17 151150820925264
18 2491064356652975
19 43353562677488606
20 900988265135221518