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A364685 as a simple table

na(n)
54
610
718
830
948
1076
11120
12190
13302
14482
15772
161240
171996
183218
195194
208390
2113560
2221924
2335456
2457350
2592774
26150090
27242828
28392880
29635668
301028506
311664130
322692590
334356672
347049212
3511405832
3618454990
3729860766
3848315698
3978176404
40126492040
41204668380

[4,10,18,30,48,76,120,190,302,482,772,1240,1996,
 3218,5194,8390,13560,21924,35456,57350,92774,
 150090,242828,392880,635668,1028506,1664130,
 2692590,4356672,7049212,11405832,18454990,
 29860766,48315698,78176404,126492040,204668380]