# A034272 (b-file synthesized from sequence entry)
0 0
1 1
2 17
3 154
4 1066
5 6370
6 34748
7 178296
8 875976
9 4167669
10 19348175
11 88112310
12 395137470
13 1749894510
14 7669512840
15 33323053200
16 143720109360
17 615950596170
18 2625443201394
19 11137650267156
20 47051359045460
21 198038873490436
22 830820684414952