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A250506 as a simple table

na(n)
1300763
29777655
3289735900
48566581775
5211068335312
64788105206370
7106126605135236
82219165591607345
944296932467093518
10863344277050145773
1116398452113636312341
12304011141191511318716
135541141767706039301570

[300763,9777655,289735900,8566581775,211068335312,
 4788105206370,106126605135236,2219165591607345,
 44296932467093518,863344277050145773,
 16398452113636312341,304011141191511318716,
 5541141767706039301570]