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A045881 as a simple table

na(n)
14
28
324
490
5140
6200
7114
81832
9524
10888
111130
121670
132478
142972
154298
165592
171328
189552
1930594
2019334
2116142
2215684
2381464
2428230
2531908
2619610
2735618
2882074
2944294
3043332
3134062
3289690
33162144
34134514
35173360
3631398
37404598
38212702
39188030
40542604

[4,8,24,90,140,200,114,1832,524,888,1130,1670,
 2478,2972,4298,5592,1328,9552,30594,19334,16142,
 15684,81464,28230,31908,19610,35618,82074,44294,
 43332,34062,89690,162144,134514,173360,31398,
 404598,212702,188030,542604]