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A031863 as a simple table

na(n)
168779
272619
385387
487847
5101767
6104611
7134299
8137083
9139259
10151351
11153103
12153715
13154135
14159727
15168811
16185399
17218079
18243043
19243907
20257819
21285587
22290899
23309563
24315071
25315256
26335031
27352419
28364255
29404171
30432951

[68779,72619,85387,87847,101767,104611,134299,
 137083,139259,151351,153103,153715,154135,159727,
 168811,185399,218079,243043,243907,257819,285587,
 290899,309563,315071,315256,335031,352419,364255,
 404171,432951]