# A298510 (b-file synthesized from sequence entry)
1 1
2 -1
3 5
4 -15
5 -489
6 -2865
7 35685
8 -135135
9 -5897745
10 58437855
11 3061162125
12 -39296062575
13 -2278224696825
14 -33411730777425
15 -1496722493140875
16 -6190283353629375
17 -1563094742062478625
18 -17805713551427426625
19 1456700757237661060125
20 11729538718345143320625