# A009455 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 -2
4 6
5 -15
6 75
7 -492
8 3668
9 -30955
10 291555
11 -3025926
12 34283106
13 -420908163
14 5566032199
15 -78872781080
16 1192366871400
17 -19156320275703
18 325945717605927
19 -5855722497051210
20 110770076684790590
21 -2200845760320344599