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A203747 as a simple table

na(n)
12
225
31300
4666536
51866588100
640227366213200
75615962423683300000
85515452582144085933300000
936695607554641784976763692852800
101681984849693348507666402129737211600000

[2,25,1300,666536,1866588100,40227366213200,
 5615962423683300000,5515452582144085933300000,
 36695607554641784976763692852800,
 1681984849693348507666402129737211600000]