# A298986 (b-file synthesized from sequence entry)
0 1
1 -1
2 -4
3 9
4 48
5 100
6 -756
7 -3479
8 -1600
9 24462
10 225900
11 364573
12 -643536
13 -9251736
14 -36989316
15 -32397975
16 165039872
17 1725828525
18 5338814652
19 8082713829
20 -26321848400
21 -233434232766
22 -811526778964
23 -1731126953532
24 1151302859712
25 23632432765000
26 113461901639788
27 287935019845749