# A130072 (b-file synthesized from sequence entry)
1 0
2 12
3 90
4 528
5 2850
6 14832
7 75810
8 383808
9 1932930
10 9705552
11 48648930
12 243605088
13 1219100610
14 6098716272
15 30503196450
16 152544778368
17 762810181890
18 3814309582992
19 19072323542370
20 95363943807648
21 476826695752770
22 2384154405761712
23 11920834803510690