# A012720 (b-file synthesized from sequence entry)
0 1
1 0
2 -1
3 -6
4 -27
5 -60
6 435
7 8750
8 84777
9 475272
10 -2114745
11 -106313438
12 -1794336819
13 -17317361204
14 18165128891
15 5261034602070
16 135408683857873
17 2003263412796176
18 6167034429608463
19 -699433926727865526