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A211721 as a simple table

na(n)
148
274
3120
4210
5376
6700
71312
82508
94800
109288
1117968
1235000
1368144
14133312
15260688
16511616
171003728
181974896
193884688
207659696
2115100048
2229828560
2358914064
24116565456
25230605584
26456911760
27905224720
281795793552
293562275344

[48,74,120,210,376,700,1312,2508,4800,9288,17968,
 35000,68144,133312,260688,511616,1003728,1974896,
 3884688,7659696,15100048,29828560,58914064,
 116565456,230605584,456911760,905224720,
 1795793552,3562275344]