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A005715 as a simple table

na(n)
44
530
6126
7393
81016
92304
104740
119042
1216236
1327742
1445474
1571955
16110448
17165104
18241128
19344964
20484500
21669294
22910822
231222749
241621224
252125200
262756780
273541590
284509180
295693454
307133130
318872231
3210960608
3313454496

[4,30,126,393,1016,2304,4740,9042,16236,27742,
 45474,71955,110448,165104,241128,344964,484500,
 669294,910822,1222749,1621224,2125200,2756780,
 3541590,4509180,5693454,7133130,8872231,10960608,
 13454496]