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A306728 as a simple table

na(n)
01
14
23072
34682022912
462745927042654535680
522033340103629170301586112512000000
6479715049773154880180722813201712394999926095872000000
71318058833735625830065875826842622254472987373414662267314001234660163584000000

[1,4,3072,4682022912,62745927042654535680,
 22033340103629170301586112512000000,
 47971504977315488018072281320171239499992609587200\
 0000,
 13180588337356258300658758268426222544729873734146\
 62267314001234660163584000000]