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A270401 as a simple table

na(n)
13
215
3275
4306142
5119655359789
611580087075793732204662
7149024368678486978900547818363959440890696944
823508494642625759146052819702452314132546312046986774534693830017181700550956750715996250

[3,15,275,306142,119655359789,
 11580087075793732204662,
 149024368678486978900547818363959440890696944,
 23508494642625759146052819702452314132546312046986\
 774534693830017181700550956750715996250]