# A335812 (b-file synthesized from sequence entry)
0 1
1 -1
2 3
3 -7
4 39
5 -31
6 1623
7 9953
8 182199
9 2116289
10 32269143
11 505278113
12 9743069559
13 214428606209
14 5156280298263
15 127321200213473
16 3176128419544119
17 80737907621585729
18 2147513299611040983
19 61423058495936864033
20 1912348969322283717879
21 64216042408215934910849