# A009420 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 2
4 -8
5 -11
6 -19
7 846
8 -1896
9 -111
10 -228159
11 2453010
12 -11353440
13 173733429
14 -3565851587
15 41759789358
16 -501111404080
17 9579604130881
18 -176443305192159
19 2870638703204994
20 -53275482352387864
21 1134671091039714069