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A278612 as a simple table

na(n)
03
18
222
360
4162
5436
61174
73164
88530
922996
1061990
11167100
12450434
131214196
143273014
158822812
1623782962
1764109844
18172815814
19465845884
201255743842
213385009204
229124701142
2324596733916
2466303466770
25178729002068
26481785610086
271298711297084
283500833146178
299436918539636
3025438353615990

[3,8,22,60,162,436,1174,3164,8530,22996,61990,
 167100,450434,1214196,3273014,8822812,23782962,
 64109844,172815814,465845884,1255743842,
 3385009204,9124701142,24596733916,66303466770,
 178729002068,481785610086,1298711297084,
 3500833146178,9436918539636,25438353615990]