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A223440 as a simple table

na(n)
116
248
348
4144
5256
6144
7432
81376
91376
10432
111296
127424
1314112
147424
151296
163888
1740160
18147520
19147520
2040160
213888
2211664
23217600
241562176
253099264
261562176
27217600
2811664
2934992
301180256
3116693920
3267182208
3367182208
3416693920
351180256

[16,48,48,144,256,144,432,1376,1376,432,1296,7424,
 14112,7424,1296,3888,40160,147520,147520,40160,
 3888,11664,217600,1562176,3099264,1562176,217600,
 11664,34992,1180256,16693920,67182208,67182208,
 16693920,1180256]