# A012135 (b-file synthesized from sequence entry)
0 1
1 4
2 92
3 5272
4 567440
5 98979200
6 25530690624
7 9147312168576
8 4349983363258624
9 2652517304182955008
10 2018610268528861424640
11 1875904660571518053251072
12 2091013498538531655993561088