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A064518 as a simple table

na(n)
11
212
336
4144
5432
61296
71728
85184
915552
1020736
1146656
1262208
13186624
14248832
15559872
16746496
171679616
182239488
192985984
206718464
218957952
2220155392
2326873856
2460466176
2535831808
2680621568
27107495424
28241864704
29322486272

[1,12,36,144,432,1296,1728,5184,15552,20736,46656,
 62208,186624,248832,559872,746496,1679616,2239488,
 2985984,6718464,8957952,20155392,26873856,
 60466176,35831808,80621568,107495424,241864704,
 322486272]