# A213298 (b-file synthesized from sequence entry)
0 1
1 10
2 100
3 865
4 6805
5 47590
6 297595
7 1662160
8 8418649
9 39598078
10 178880725
11 795246055
12 3519278713
13 15573399301
14 69314501935
15 311040898945
16 1411268823196
17 6478030875460
18 30129403442530
19 141971859499360
20 678365095896001
21 3285531463054108
22 16137537771997720