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A244557 as a simple table

na(n)
14
29
325
449
511
619
7149
8181
949
10481
1191
12949
13161
14169
151649
16259
172581
18361
193649
20491
21499
224981
23649
246481
258149
26101
27109
281049
291081
30119
311449
32191
331949
341981
3511681
361251
3712549
381369
3913649
401499
4114981
421641
431811
441819
4518149
4618181
47411
48449

[4,9,25,49,11,19,149,181,49,481,91,949,161,169,
 1649,259,2581,361,3649,491,499,4981,649,6481,8149,
 101,109,1049,1081,119,1449,191,1949,1981,11681,
 1251,12549,1369,13649,1499,14981,1641,1811,1819,
 18149,18181,411,449]