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A322248 as a simple table

na(n)
01
15
257
3605
46961
581525
6973545
711765325
8143522145
91763351525
1021789466777
11270509191485
123371353189009
1342155188480085
14528587607974217
156644129071092525
1683691484792766145
171056178325362832325
1813351036742005533945
19169019946403985898525
202142600388730167543281
2127193744661180635582005
22345520219114720175821737
234394534009569783690837005
2455943630366450131877449761
25712778930909503993783945125

[1,5,57,605,6961,81525,973545,11765325,143522145,
 1763351525,21789466777,270509191485,3371353189009,
 42155188480085,528587607974217,6644129071092525,
 83691484792766145,1056178325362832325,
 13351036742005533945,169019946403985898525,
 2142600388730167543281,27193744661180635582005,
 345520219114720175821737,
 4394534009569783690837005,
 55943630366450131877449761,
 712778930909503993783945125]