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A278351 as a simple table

na(n)
12
27
326
497
5341
6241
76091
83173
92869
102521
1116022
1226603
13114358
1441779
1574491
1639343
17463161
18104659
19248407
20517421
21923722
22506509
231930823
24584213
252560177
264036967
274570411
284552363
297879253
304417813
3127841051
325167587
3313683034
349725107
3547735342
3625045771
3763305661

[2,7,26,97,341,241,6091,3173,2869,2521,16022,
 26603,114358,41779,74491,39343,463161,104659,
 248407,517421,923722,506509,1930823,584213,
 2560177,4036967,4570411,4552363,7879253,4417813,
 27841051,5167587,13683034,9725107,47735342,
 25045771,63305661]