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A279810 as a simple table

na(n)
01
11
25
35
421
521
685
785
8321
9381
101349
111397
125205
135973
1421829
1521885
1682245
1797653
18345169
19357725
201332565
211529173
225587265
235600605
2421058581
2524991701
2688364101
2791576149
28341071173
29391632213
301430541573
311434277365
325390013717
336400341365

[1,1,5,5,21,21,85,85,321,381,1349,1397,5205,5973,
 21829,21885,82245,97653,345169,357725,1332565,
 1529173,5587265,5600605,21058581,24991701,
 88364101,91576149,341071173,391632213,1430541573,
 1434277365,5390013717,6400341365]