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A222558 as a simple table

na(n)
13736971300983
21868582442157
31245659681423
4934275734321
5747425233469
6622762733249
7534156162737
8467093343419
9415824854441
10373728877943
11339743670103
12311538175027
13287741107327
14266994001331
15249114901193
16233613943273
17219815919913
18208214150917

[3736971300983,1868582442157,1245659681423,
 934275734321,747425233469,622762733249,
 534156162737,467093343419,415824854441,
 373728877943,339743670103,311538175027,
 287741107327,266994001331,249114901193,
 233613943273,219815919913,208214150917]