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A236481 as a simple table

na(n)
13
21949
34217
48219
59929
622091
723537
828097
938711
1041609
1150051
1260899
1368111
1472227
1574159
1679631
17115151
18122399
19127679
20150959
21155537
22266687
23267611
24270551
25271499
26284741
27306347
28428297
29433661
30444287

[3,1949,4217,8219,9929,22091,23537,28097,38711,
 41609,50051,60899,68111,72227,74159,79631,115151,
 122399,127679,150959,155537,266687,267611,270551,
 271499,284741,306347,428297,433661,444287]