# A176916 (b-file synthesized from sequence entry)
0 2
1 11
2 36
3 141
4 646
5 3151
6 15656
7 78161
8 390666
9 1953171
10 9765676
11 48828181
12 244140686
13 1220703191
14 6103515696
15 30517578201
16 152587890706
17 762939453211
18 3814697265716
19 19073486328221
20 95367431640726
21 476837158203231