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A045991 as a simple table

na(n)
00
10
24
318
448
5100
6180
7294
8448
9648
10900
111210
121584
132028
142548
153150
163840
174624
185508
196498
207600
218820
2210164
2311638
2413248
2515000
2616900
2718954
2821168
2923548
3026100
3128830
3231744
3334848
3438148
3541650
3645360
3749284
3853428
3957798
4062400
4167240
4272324

[0,0,4,18,48,100,180,294,448,648,900,1210,1584,
 2028,2548,3150,3840,4624,5508,6498,7600,8820,
 10164,11638,13248,15000,16900,18954,21168,23548,
 26100,28830,31744,34848,38148,41650,45360,49284,
 53428,57798,62400,67240,72324]