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A321220 as a simple table

na(n)
02
13
24
37
46
511
68
715
810
919
1012
1123
1214
1327
1416
1531
1618
1735
1820
1939
2022
2143
2224
2347
2426
2551
2628
2755
2830
2959
3032
3163
3234
3367
3436
3571
3638
3775
3840
3979
4042
4183
4244
4387
4446
4591
4648
4795
4850
4999
5052
51103
5254
53107
5456
55111
5658
57115
5860
59119
6062
61123
6264
63127
6466

[2,3,4,7,6,11,8,15,10,19,12,23,14,27,16,31,18,35,
 20,39,22,43,24,47,26,51,28,55,30,59,32,63,34,67,
 36,71,38,75,40,79,42,83,44,87,46,91,48,95,50,99,
 52,103,54,107,56,111,58,115,60,119,62,123,64,127,
 66]