# A233533 (b-file synthesized from sequence entry)
1 1
2 3
3 9
4 40
5 264
6 2379
7 27568
8 392895
9 6663624
10 131211423
11 2943137604
12 74087543634
13 2068127523264
14 63395972293650
15 2116776180704988
16 76462961271015326
17 2970720383283042732
18 123517218432709179030
19 5472063213488927240290
20 257315864404023900340860
21 12799687840583182179921204