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A255105 as a simple table

na(n)
1540
21008
32032
44338
59297
619263
738010
873278
9143045
10288057
11594045
121228136
132495244
144970793
159823140
1619533636
1739362880
1880112560
19163010352
20329127561
21659192991
221316427636
232637095196
245313657069
2510747592751
2621727946097

[540,1008,2032,4338,9297,19263,38010,73278,143045,
 288057,594045,1228136,2495244,4970793,9823140,
 19533636,39362880,80112560,163010352,329127561,
 659192991,1316427636,2637095196,5313657069,
 10747592751,21727946097]