# A203747 (b-file synthesized from sequence entry)
1 2
2 25
3 1300
4 666536
5 1866588100
6 40227366213200
7 5615962423683300000
8 5515452582144085933300000
9 36695607554641784976763692852800
10 1681984849693348507666402129737211600000