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A146411 as a simple table

na(n)
11
21
31
41
51
61
77
821
945
1089
11233
12863
133251
1415437
1573625
16393971
172328247
1815894743
19120359659
201040197243
219831811849
22105976019467

[1,1,1,1,1,1,7,21,45,89,233,863,3251,15437,73625,
 393971,2328247,15894743,120359659,1040197243,
 9831811849,105976019467]