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A070980 as a simple table

na(n)
140
242
396
4180
5280
61664
71704
81932
91960
102184
112304
122310
134816
144928
157252
169360
179792
1812888
1912896
2013338
2113720
2214256
2315792
2416240
2517408
2617940
2717952
2818096
2920000
3020016
3121200
3221450
3325080
3425600
3527136
3628980
3730016
3831808
3934048
4034240
4134320
4234368
4335028
4436576
4536652
4637332
4738088
4839936
4945056
5047880

[40,42,96,180,280,1664,1704,1932,1960,2184,2304,
 2310,4816,4928,7252,9360,9792,12888,12896,13338,
 13720,14256,15792,16240,17408,17940,17952,18096,
 20000,20016,21200,21450,25080,25600,27136,28980,
 30016,31808,34048,34240,34320,34368,35028,36576,
 36652,37332,38088,39936,45056,47880]