# A128196 (b-file synthesized from sequence entry)
0 1
1 3
2 13
3 73
4 527
5 4775
6 52589
7 683785
8 10257031
9 174370039
10 3313031765
11 69573669113
12 1600194393695
13 40004859850567
14 1080131215981693
15 31323805263501865
16 971037963168623351
17 32044252784564701655
18 1121548847459764820069
19 41497307356011298866841
20 1618394986884440656855375