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A181940 as a simple table

na(n)
00
11
20
32
40
51
63
71
80
92
104
112
120
131
143
155
163
171
180
192
204
216
224
232
240
251
263
275
287
295
303
311
320
332
344
356
368
376
384
392
400
411
423
435
447
459
467
475
483
491
500
512
524
536
548
5510
568
576
584
592
600
611
623
635
647
659
6611
679
687
695
703
711
720
732
744
756
768
7710
7812
7910
808
816
824
832
840
851
863
875
887
899
9011
9113
9211
939
947
955
963
971
980
992
1004
1016
1028
10310
10412

[0,1,0,2,0,1,3,1,0,2,4,2,0,1,3,5,3,1,0,2,4,6,4,2,
 0,1,3,5,7,5,3,1,0,2,4,6,8,6,4,2,0,1,3,5,7,9,7,5,3,
 1,0,2,4,6,8,10,8,6,4,2,0,1,3,5,7,9,11,9,7,5,3,1,0,
 2,4,6,8,10,12,10,8,6,4,2,0,1,3,5,7,9,11,13,11,9,7,
 5,3,1,0,2,4,6,8,10,12]