# A151361 (b-file synthesized from sequence entry)
0 1
1 2
2 13
3 124
4 1427
5 18424
6 257090
7 3794091
8 58411957
9 929535968
10 15190791558
11 253735278108
12 4316305707838
13 74571507312612
14 1305616160300541
15 23124883139330156
16 413757060245969804
17 7469673227755295934
18 135931742489359394834
19 2491396081566293784574
20 45957915237430642944461