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A054498 as a simple table

na(n)
01
14
216
344
4116
5260
6560
71100
82090
93740
106512
1110868
1217732
1328028
1443472
1565780
1697955
17143000
18205920
19291720
20408408
21563992
22770848
231041352
241394068
251847560
262428960
273165400
284095640
295258440
306708064
318498776
3210705189
3313401916
3416689904

[1,4,16,44,116,260,560,1100,2090,3740,6512,10868,
 17732,28028,43472,65780,97955,143000,205920,
 291720,408408,563992,770848,1041352,1394068,
 1847560,2428960,3165400,4095640,5258440,6708064,
 8498776,10705189,13401916,16689904]