# A111873 (b-file synthesized from sequence entry)
1 0
2 6
3 128
4 2500
5 51840
6 1176490
7 29360128
8 803538792
9 24000000000
10 778122738030
11 27243640258560
12 1025115745389164
13 41273168209215488
14 1771037512207031250
15 80704505322479288320
16 3892895350053349478480
17 198189314749641818898432