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A181558 as a simple table

na(n)
11
22
36
420
531
614
7126
885
936
10145
11140
12122
13376
14231
15162
16483
17692
18600
19993
201188
211106
222440
231080
242814
252586
26450
272696
283473
294254
304857
315918
322364
334760
344818
3521192
3613116
3719284
3814855
3912158
4031032
4118174
4215068
4335700
4456846
4527367
4633716
4713736
4816746
49103292
508541

[1,2,6,20,31,14,126,85,36,145,140,122,376,231,162,
 483,692,600,993,1188,1106,2440,1080,2814,2586,450,
 2696,3473,4254,4857,5918,2364,4760,4818,21192,
 13116,19284,14855,12158,31032,18174,15068,35700,
 56846,27367,33716,13736,16746,103292,8541]