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A048472 as a simple table

na(n)
01
12
21
35
43
51
613
79
84
91
1033
1125
1213
135
141
1581
1665
1737
1817
196
201
21193
22161
2397
2449
2521
267
271
28449
29385
30241
31129
3261
3325
348
351
361025
37897
38577
39321
40161
4173
4229
439
441
452305
462049
471345
48769
49401
50193
5185
5233
5310
541
555121
564609
573073

[1,2,1,5,3,1,13,9,4,1,33,25,13,5,1,81,65,37,17,6,
 1,193,161,97,49,21,7,1,449,385,241,129,61,25,8,1,
 1025,897,577,321,161,73,29,9,1,2305,2049,1345,769,
 401,193,85,33,10,1,5121,4609,3073]