# A012881 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 -3
4 -15
5 5
6 345
7 889
8 -11263
9 -82167
10 455025
11 7869301
12 -16466703
13 -906141171
14 -746021367
15 128450716913
16 480286325633
17 -22562588189167
18 -150637957014303
19 4955964959446253
20 46203820378253425