# A107026 (b-file synthesized from sequence entry)
0 1
1 2
2 10
3 62
4 426
5 3112
6 23686
7 185684
8 1488554
9 12144248
10 100489320
11 841268078
12 7112138790
13 60629940152
14 520591221412
15 4498091003272
16 39079909924522
17 341193986978008
18 2991881019936760
19 26338436818801496
20 232688056611178216