# A012841 (b-file synthesized from sequence entry)
0 1
1 4
2 20
3 -1024
4 -147568
5 -19148736
6 -2934842560
7 -551525234688
8 -127249126657792
9 -35789287036394496
10 -12158191126869847040
11 -4941201795126314303488
12 -2379230211581147229286400