# A105249 (b-file synthesized from sequence entry)
0 1
1 21
2 168
3 840
4 3150
5 9702
6 25872
7 61776
8 135135
9 275275
10 528528
11 965328
12 1689324
13 2848860
14 4651200
15 7379904
16 11415789
17 17261937
18 25573240
19 37191000
20 53183130
21 74890530
22 103980240
23 142506000
24 192976875
25 258434631
26 342540576
27 449672608
28 585033240
29 754769400