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A180296 as a simple table

na(n)
71
81106
99912
1027600
1154450
1296030
13160888
14259896
15406980
16620160
17922488
181343034
191917993
202691920
213719100
225065060
236808230
249041760
2511875500
2615438150
2719879587
2825373376
2932119472
3040347120
3150317960
3262329344
3376717872

[1,1106,9912,27600,54450,96030,160888,259896,
 406980,620160,922488,1343034,1917993,2691920,
 3719100,5065060,6808230,9041760,11875500,15438150,
 19879587,25373376,32119472,40347120,50317960,
 62329344,76717872]