# A104670 (b-file synthesized from sequence entry)
0 1
1 24
2 216
3 1200
4 4950
5 16632
6 48048
7 123552
8 289575
9 629200
10 1283568
11 2482272
12 4585308
13 8139600
14 13953600
15 23193984
16 37509021
17 59183784
18 91333000
19 138138000
20 205134930
21 299562120
22 430775280
23 610740000
24 854611875
25 1181415456
26 1614834144
27 2184124096
28 2925166200