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A303604 as a simple table

na(n)
13
26
37
413
561
6157
7241
8409
9421
101321
111621
123541
134129
145209
155701
168269
179241
189769
1911701
2012601
2113729
2218181
2327061
2432341
2539901
2678121
2778541
28118681
29129361
30153469
31189661
32207481
33314161
34431869
35451669
36455701
37507301
38655561
39842521
40979969

[3,6,7,13,61,157,241,409,421,1321,1621,3541,4129,
 5209,5701,8269,9241,9769,11701,12601,13729,18181,
 27061,32341,39901,78121,78541,118681,129361,
 153469,189661,207481,314161,431869,451669,455701,
 507301,655561,842521,979969]