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A197442 as a simple table

na(n)
13
26
36
410
534
610
728
8246
9246
1028
1166
121736
135032
141736
1566
16164
1712450
1898356
1998356
2012450
21164
22400
2389528
241933358
255184780
261933358
2789528
28400
29982
30644328
3137989740
32279785830
33279785830
3437989740
35644328
36982
372406
384638654
39746250884

[3,6,6,10,34,10,28,246,246,28,66,1736,5032,1736,
 66,164,12450,98356,98356,12450,164,400,89528,
 1933358,5184780,1933358,89528,400,982,644328,
 37989740,279785830,279785830,37989740,644328,982,
 2406,4638654,746250884]