# 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