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A247691 as a simple table

na(n)
13896
24027
36583
48751
512067
612131
719187
819651
920276
1020568
1121224
1222711
1323428
1424340
1524904
1625447
1726139
1826760
1927355
2027991
2128031
2228759
2331639
2431999
2532968
2634088
2734507
2835367
2936276
3036807
3137219
3237540
3339819
3440299
3540692
3641015
3741063
3841583
3941671
4042423
4143192

[3896,4027,6583,8751,12067,12131,19187,19651,
 20276,20568,21224,22711,23428,24340,24904,25447,
 26139,26760,27355,27991,28031,28759,31639,31999,
 32968,34088,34507,35367,36276,36807,37219,37540,
 39819,40299,40692,41015,41063,41583,41671,42423,
 43192]