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A276971 as a simple table

na(n)
11
23
311
415
531
635
751
8121
9341
10451
11455
12671
13781
141111
151235
161271
171441
181547
191661
201991
212091
222101
232321
242651
252761
262981
273091
283421
293641
303731
313751
324403
334411
344631
354741
365071
375401
385731
395951
406171
416191
426281
436611
446851
456941
467051
477271
487601
497711
508261
518371
528435
538921

[1,3,11,15,31,35,51,121,341,451,455,671,781,1111,
 1235,1271,1441,1547,1661,1991,2091,2101,2321,2651,
 2761,2981,3091,3421,3641,3731,3751,4403,4411,4631,
 4741,5071,5401,5731,5951,6171,6191,6281,6611,6851,
 6941,7051,7271,7601,7711,8261,8371,8435,8921]