# A013447 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 160
4 -1792
5 484224
6 -15071232
7 6570936320
8 -461050544128
9 285431558799360
10 -41198126773469184
11 31834693166688370688
12 -8575650915562515595264
13 7808988993818084822220800