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A007209 as a simple table

na(n)
01
11
22
32
44
55
67
79
812
916
1020
1125
1232
1339
1449
1558
1673
1786
18105
19123
20149
21175
22207
23241
24284
25331
26385
27444
28515
29592
30682
31777
32894
331015
341160
351310
361492
371683
381903
392140
402412
412708
423037
433395
443801
454239
464730
475254
485852
496489
507204
517965
528823
539741

[1,1,2,2,4,5,7,9,12,16,20,25,32,39,49,58,73,86,
 105,123,149,175,207,241,284,331,385,444,515,592,
 682,777,894,1015,1160,1310,1492,1683,1903,2140,
 2412,2708,3037,3395,3801,4239,4730,5254,5852,6489,
 7204,7965,8823,9741]