# A074252 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 30
4 84
5 9150
6 47244
7 75360
8 177287
9 281868
10 705790
11 3043504
12 9669715
13 20139930
14 32043111
15 67447484
16 291217662
17 7544909388
18 8396469108
19 21425170627