# A119574 (b-file synthesized from sequence entry)
0 4
1 9
2 32
3 125
4 504
5 2058
6 8448
7 34749
8 143000
9 588302
10 2418624
11 9934834
12 40770352
13 167152500
14 684656640
15 2801810205
16 11455885080
17 46801769190
18 191055480000
19 779363066790
20 3177034283280
21 12942655253580
22 52693956656640