# A077919 (b-file synthesized from sequence entry)
0 1
1 -1
2 5
3 -13
4 39
5 -113
6 331
7 -965
8 2819
9 -8229
10 24027
11 -70149
12 204811
13 -597973
14 1745867
15 -5097301
16 14882283
17 -43450901
18 126860971
19 -370388309
20 1081400363
21 -3157299285
22 9218175915
23 -26913751125
24 78578452651
25 -229420759381
26 669825926315
27 -1955650276693
28 5709793924779