# A012747 (b-file synthesized from sequence entry)
0 1
1 1
2 -3
3 45
4 2457
5 161625
6 20549397
7 3457938757
8 772773915313
9 221864504883633
10 79479234590193325
11 34768359140993612893
12 18241340561609524790601
13 11306811847252896133698825