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A120573 as a simple table

na(n)
16
260
3330
41224
53510
68436
717850
834320
961254
10103020
11165066
12254040
13377910
14546084
15769530
161060896
171434630
181907100
192496714
203224040
214111926
225185620
236472890
248004144
259812550
2611934156
2714408010
2817276280
2920584374
3024381060

[6,60,330,1224,3510,8436,17850,34320,61254,103020,
 165066,254040,377910,546084,769530,1060896,
 1434630,1907100,2496714,3224040,4111926,5185620,
 6472890,8004144,9812550,11934156,14408010,
 17276280,20584374,24381060]