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A306742 as a simple table

na(n)
10
24
36
414
526
654
7104
8210
9412
10832
111654
123330
136670
1413452
1527004
1654414
17109400
18220264
19442938
20891256
211791894
223603128
237241452
2414552628
2529234478
2658720290
27117911510
28236729446
29475169660
30953616548
311913446072
323838773120
337700145556
3415443494464
3530969376788
3662096345834
37124493833506

[0,4,6,14,26,54,104,210,412,832,1654,3330,6670,
 13452,27004,54414,109400,220264,442938,891256,
 1791894,3603128,7241452,14552628,29234478,
 58720290,117911510,236729446,475169660,953616548,
 1913446072,3838773120,7700145556,15443494464,
 30969376788,62096345834,124493833506]