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A003805 as a simple table

na(n)
15348063769211699200
2961721214905722855895197286400
378099458182389588115529148326215680000
4103044374585338670859375000000000000000000000
5170115000551935077294273059250893063598899496222720000
6770654129255561941216424578913668563609374922170066534400

[5348063769211699200,
 961721214905722855895197286400,
 78099458182389588115529148326215680000,
 103044374585338670859375000000000000000000000,
 17011500055193507729427305925089306359889949622272\
 0000,
 77065412925556194121642457891366856360937492217006\
 6534400]