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A083848 as a simple table

na(n)
11
21
32
42
54
66
710
814
920
1026
1140
1256
1390
14126
15180
16250
17350
18496
19716
201010
211440
222034
232896
244086
255774
268184
2711566
2816380
2923166
3032766
3146326
3265534
3392666
34131070
35185354
36262130
37370714
38524260
39741454
401048554
411482904
422097146

[1,1,2,2,4,6,10,14,20,26,40,56,90,126,180,250,350,
 496,716,1010,1440,2034,2896,4086,5774,8184,11566,
 16380,23166,32766,46326,65534,92666,131070,185354,
 262130,370714,524260,741454,1048554,1482904,
 2097146]