# A145360 (b-file synthesized from sequence entry)
0 1
1 6
2 78
3 804
4 8316
5 85176
6 1021608
7 11394432
8 144885888
9 1886008320
10 26529503616
11 390680672256
12 6237490904064
13 104348756736000
14 1873079661358080
15 35428981499412480
16 710916534432276480
17 14999585506406645760
18 333292875250857984000
19 7754472236069830656000