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A288476 as a simple table

na(n)
02
14
28
320
444
5108
6244
7588
81348
93212
107428
1117580
1240868
1396332
14224644
15528236
161234148
172897804
186777924
1915900844
2037216932
2187264460
22204330500
23478954476
241121747556
252628904460
266157985732
2714430108460
2833804242468
2979208704844
30185565457796

[2,4,8,20,44,108,244,588,1348,3212,7428,17580,
 40868,96332,224644,528236,1234148,2897804,6777924,
 15900844,37216932,87264460,204330500,478954476,
 1121747556,2628904460,6157985732,14430108460,
 33804242468,79208704844,185565457796]