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A278515 as a simple table

na(n)
01
10
20
31
40
50
62
70
81
90
100
112
120
130
140
151
164
170
183
190
200
212
220
230
241
250
260
274
280
290
303
310
322
330
340
351
360
370
385
390
404
410
420
433
440
452
460
470
481
490
500
515
520
534
540
550
563
570
580
592
600
610
620
631
647
650
660
676
680
690
705
710
724
730
740
753
760
770
782
790
801
810
820
837
840
856
860
870
885
890
904
910
920
933
940
950
962
970
980
991
1000
1010
1027
1030
1040
1056
1060
1070
1085
1090
1100
1110
1124
1130
1140
1153
1160
1172
1180
1190
1201

[1,0,0,1,0,0,2,0,1,0,0,2,0,0,0,1,4,0,3,0,0,2,0,0,
 1,0,0,4,0,0,3,0,2,0,0,1,0,0,5,0,4,0,0,3,0,2,0,0,1,
 0,0,5,0,4,0,0,3,0,0,2,0,0,0,1,7,0,0,6,0,0,5,0,4,0,
 0,3,0,0,2,0,1,0,0,7,0,6,0,0,5,0,4,0,0,3,0,0,2,0,0,
 1,0,0,7,0,0,6,0,0,5,0,0,0,4,0,0,3,0,2,0,0,1]