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A288405 as a simple table

na(n)
15
27
319
4109
510399
634459429
76190283353629379
8319830986772877770815629
9563862029680583509947946879
10174865344543353986303948473285124243127671456831640629
112987435000850314871976096554696085799164511452611632783323554397412109379

[5,7,19,109,10399,34459429,6190283353629379,
 319830986772877770815629,
 563862029680583509947946879,
 17486534454335398630394847328512424312767145683164\
 0629,
 29874350008503148719760965546960857991645114526116\
 32783323554397412109379]