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A139047 as a simple table

na(n)
01
11
22
33
45
51
66
77
813
920
101
1121
121
1322
141
1523
1624
1747
1871
19118
201
21119
22120
23239
24359
25598
261
27599
28600
291199
301799
312998
321
332999
343000
351
363001
373002
381
393003
403004
416007
429011
4315018
441
4515019
461
4715020
481
4915021
5015022
5130043
521
5330044
541
5530045
5630046
5760091

[1,1,2,3,5,1,6,7,13,20,1,21,1,22,1,23,24,47,71,
 118,1,119,120,239,359,598,1,599,600,1199,1799,
 2998,1,2999,3000,1,3001,3002,1,3003,3004,6007,
 9011,15018,1,15019,1,15020,1,15021,15022,30043,1,
 30044,1,30045,30046,60091]