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A081853 as a simple table

na(n)
13
260
314
4268065
533
62093
760
81204154941925628
995
1013398
11138
12701600900
13189
1447415
15248
161489788110004539889867929328515560588293
17315
18123728
19390
2034427225343
21473
22268065
23564
2419873182780430314444725
25663
26512298
27770
28467193780498
29885
30894443
311008

[3,60,14,268065,33,2093,60,1204154941925628,95,
 13398,138,701600900,189,47415,248,
 1489788110004539889867929328515560588293,315,
 123728,390,34427225343,473,268065,564,
 19873182780430314444725,663,512298,770,
 467193780498,885,894443,1008]