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A318509 as a simple table

na(n)
11
21
32
41
53
62
73
81
94
103
115
122
135
143
156
161
175
184
197
203
216
225
237
242
259
265
278
283
297
306
315
321
3310
345
359
364
3711
387
3910
403
4111
426
4313
445
4512
467
479
482
499
509
5110
525
5313
548
5515
563
5714
587
5911
606
619
625
6312
641
6515
6610
6711
685
6914
709
7113
724
7315
7411
7518
767
7715
7810
7913
803
8116
8211
8319
846
8515
8613
8714
885
8917
9012
9115
927
9310
949
9521
962
9711
989
9920
1009
10119
10210
10317
1045
10518

[1,1,2,1,3,2,3,1,4,3,5,2,5,3,6,1,5,4,7,3,6,5,7,2,
 9,5,8,3,7,6,5,1,10,5,9,4,11,7,10,3,11,6,13,5,12,7,
 9,2,9,9,10,5,13,8,15,3,14,7,11,6,9,5,12,1,15,10,
 11,5,14,9,13,4,15,11,18,7,15,10,13,3,16,11,19,6,
 15,13,14,5,17,12,15,7,10,9,21,2,11,9,20,9,19,10,
 17,5,18]