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A305904 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
117
1211
137
1412
1513
1614
1715
1816
197
2017
2118
2219
2320
2421
2522
2623
2724
2825
2926
3027
317
3228
3329
3430
3531
3632
377
3833
3934
4035
417
4236
4337
4438
4539
4640
477
4841
4942
5043
5144
5245
5346
5447
5548
5649
5750
5851
597
6052
617
6253
6354
6455
6556
6657
677
6858
6959
7060
7161
7262
737
7463
7564
7665
7766
7867
7968
8069
8170
8271
8372
8473
8574
8675
8776
8877
8978
9079
9180
9281
9382
9483
9584
9685
977

[1,2,3,4,5,6,7,8,9,10,7,11,7,12,13,14,15,16,7,17,
 18,19,20,21,22,23,24,25,26,27,7,28,29,30,31,32,7,
 33,34,35,7,36,37,38,39,40,7,41,42,43,44,45,46,47,
 48,49,50,51,7,52,7,53,54,55,56,57,7,58,59,60,61,
 62,7,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,
 78,79,80,81,82,83,84,85,7]