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A221476 as a simple table

na(n)
12
25
3113
4227
52417
63637
77253
814549
914563
1030559
1138677
1238833
13155333
14206923
15207121
16217309
17464213
18466033
19620771
20827693
21915737
221100149
231100353
241220983
251303873
261472893
271656901
281963813
292327483
302475797
312933717
322933731
333313777
343491083

[2,5,113,227,2417,3637,7253,14549,14563,30559,
 38677,38833,155333,206923,207121,217309,464213,
 466033,620771,827693,915737,1100149,1100353,
 1220983,1303873,1472893,1656901,1963813,2327483,
 2475797,2933717,2933731,3313777,3491083]