# A079920 (b-file synthesized from sequence entry)
0 1
1 16
2 6746
3 313464
4 9479292
5 174763208
6 2262089361
7 22088730348
8 171764779170
9 1106667645872
10 6087616677864
11 29267369636800
12 125299076209408
13 485013257865472
14 1718947213795328
15 5636819806209792
16 17235204961273600
17 49467590616190208
18 134058587073795072
19 344809293460572928
20 845577589114049792
21 1985060631106310400