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A257606 as a simple table

na(n)
01
14
24
316
440
516
664
7296
8296
964
10256
111928
123552
131928
14256
151024
1611688
1734808
1834808
1911688
201024
214096
2267656
23302352
24487312
25302352
2667656
274096
2816384
29379240
302423016
315830000
325830000
332423016
34379240
3516384
3665536
372076424
3818330496
3962617144
4093280000
4162617144
4218330496
432076424
4465536

[1,4,4,16,40,16,64,296,296,64,256,1928,3552,1928,
 256,1024,11688,34808,34808,11688,1024,4096,67656,
 302352,487312,302352,67656,4096,16384,379240,
 2423016,5830000,5830000,2423016,379240,16384,
 65536,2076424,18330496,62617144,93280000,62617144,
 18330496,2076424,65536]