# A216814 (b-file synthesized from sequence entry)
2 2
3 4
4 10
5 12
6 84
7 264
8 990
9 2860
10 9724
11 18564
12 117572
13 45220
14 19380
15 1782960
16 6463230
17 25092540
18 58549260
19 95527740