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A013478 as a simple table

na(n)
02
1242
2735842
312696924242
4729261623797442
5105330801708282667442
632155390653420235027326242
718430773614710132775756232045842
818200656974294045189446138614387578242
929009142008847262758691664682458471045155442

[2,242,735842,12696924242,729261623797442,
 105330801708282667442,32155390653420235027326242,
 18430773614710132775756232045842,
 18200656974294045189446138614387578242,
 29009142008847262758691664682458471045155442]