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A277972 as a simple table

na(n)
11
22
33
48
55
64
714
815
924
1010
1112
1213
1316
146
157
1617
1726
1818
199
2011
2119
2220
2321
2422
2523
2625
2727
2828
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4646
4747
4848
4949
5050
5151
5252
5353
5454
5555
5656
5757
5858
5959
6064
6160
6261
6362
6463
6565
6666
6767
6868
6969

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