# A013342 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 -2
4 0
5 -8
6 40
7 -226
8 896
9 -13264
10 62304
11 -1040866
12 6528896
13 -128181272
14 950205568
15 -21880956098
16 189104984064
17 -4957876255136
18 48968006626816
19 -1441276692392770
20 16013733248841728
21 -522786344819213608