# A207322 (b-file synthesized from sequence entry)
0 0
1 -3
2 12
3 -81
4 558
5 -4095
6 31074
7 -241761
8 1915998
9 -15403839
10 125264226
11 -1028198769
12 8505440256
13 -70821126339
14 593013903996
15 -4989710564097
16 42162715062462
17 -357607035133503
18 3043168538309586
19 -25973801534610801
20 222282241838388288
21 -1906876619917171299
22 16394307639893817516
23 -141231930366941378721