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A250670 as a simple table

na(n)
1669
25154
334630
4210158
51185860
66325144
732230991
8158164928
9752162284
103484008326
1115783790118
1270176461116
13307081524576
141325658002144
155657123014959
1623904700805062
17100166248075189
18416720321036830

[669,5154,34630,210158,1185860,6325144,32230991,
 158164928,752162284,3484008326,15783790118,
 70176461116,307081524576,1325658002144,
 5657123014959,23904700805062,100166248075189,
 416720321036830]