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A126251 as a simple table

na(n)
120
242
3156
4342
5930
61806
73660
85256
910506
1011772
1119182
1222650
1332580
1437056
1539402
1652212
1757840
1873170
1979806
2097656
21121452
22176820
23187056
24213906
25273006
26325470
27360600
28382542
29412806
30436260
31656910
32676506
33686412
34737022
35778806

[20,42,156,342,930,1806,3660,5256,10506,11772,
 19182,22650,32580,37056,39402,52212,57840,73170,
 79806,97656,121452,176820,187056,213906,273006,
 325470,360600,382542,412806,436260,656910,676506,
 686412,737022,778806]