# A088675 (b-file synthesized from sequence entry)
0 0
1 1
2 -2
3 8
4 -36
5 160
6 -656
7 2368
8 -7664
9 29440
10 -184896
11 1174272
12 -3395200
13 -21222400
14 178961920
15 1638189056
16 -27449296640
17 -28875071488
18 3234263731200
19 -10138343231488
20 -422012179953664
21 3426627065331712
22 59293997091528704