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A013998 as a simple table

na(n)
1271441
2904631
316532714
424658561
527422714
627664033
746672291
8102690901
9130944133
10196075949
11214038533
12517697641
13545670533
14801123451
15855073301
16903136901
17970355431
181091327579
191133818561
201235188597
211389675541
221502682721
232059739221
242304156469
252976407809
263273820903

[271441,904631,16532714,24658561,27422714,
 27664033,46672291,102690901,130944133,196075949,
 214038533,517697641,545670533,801123451,855073301,
 903136901,970355431,1091327579,1133818561,
 1235188597,1389675541,1502682721,2059739221,
 2304156469,2976407809,3273820903]