# A203511 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 252
4 576576
5 87178291200
6 1386980110791475200
7 3394352757964564324299571200
8 1760578659300452732262852600316664217600
9 255323290537547288382098619855584488593426606981120000