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A180985 as a simple table

na(n)
12
23
33
44
57
64
75
814
914
105
116
1225
1345
1425
156
167
1741
18130
19130
2041
217
228
2363
24336
25650
26336
2763
288
299
3092
31785
322942
332942
34785
3592
369
3710
38129
391682
4011819
4124520
4211819
431682
44129
4510
4611
47175
483351
4942305
50183010
51183010
5242305
533351
54175
5511
5612
57231
586280
59136564

[2,3,3,4,7,4,5,14,14,5,6,25,45,25,6,7,41,130,130,
 41,7,8,63,336,650,336,63,8,9,92,785,2942,2942,785,
 92,9,10,129,1682,11819,24520,11819,1682,129,10,11,
 175,3351,42305,183010,183010,42305,3351,175,11,12,
 231,6280,136564]