# A304723 (b-file synthesized from sequence entry)
0 0
1 1
2 20
3 325
4 5000
5 75625
6 1137500
7 17078125
8 256250000
9 3844140625
10 57664062500
11 864970703125
12 12974609375000
13 194619384765625
14 2919291992187500
15 43789385986328125
16 656840820312500000
17 9852612457275390625
18 147789187622070312500
19 2216837818145751953125
20 33252567291259765625000