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A011860 as a simple table

na(n)
00
10
20
30
41
52
64
76
88
910
1012
1115
1218
1322
1426
1530
1634
1738
1843
1948
2054
2160
2266
2372
2478
2585
2692
27100
28108
29116
30124
31132
32141
33150
34160
35170
36180
37190
38200
39211
40222
41234
42246
43258
44270
45282
46295
47308
48322
49336
50350
51364
52378
53393
54408
55424
56440
57456
58472
59488
60505

[0,0,0,0,1,2,4,6,8,10,12,15,18,22,26,30,34,38,43,
 48,54,60,66,72,78,85,92,100,108,116,124,132,141,
 150,160,170,180,190,200,211,222,234,246,258,270,
 282,295,308,322,336,350,364,378,393,408,424,440,
 456,472,488,505]