# A013166 (b-file synthesized from sequence entry)
0 1
1 0
2 -4
3 6
4 45
5 -300
6 -630
7 18270
8 -44415
9 -1428840
10 13608000
11 106964550
12 -3044747475
13 2748645900
14 674525001150
15 -6848689097250
16 -138141621993375
17 3761985048822000
18 12387014410270500
19 -1765001060909336250