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A075830 as a simple table

na(n)
10
21
31
45
57
647
737
8319
9533
101879
111627
1220417
1318107
14263111
15237371
1652279
1795549
181768477
191632341
2033464927
21155685007
22166770367
23156188887
243825136961
253602044091
2619081066231
2718051406831
2857128792093
297751493599

[0,1,1,5,7,47,37,319,533,1879,1627,20417,18107,
 263111,237371,52279,95549,1768477,1632341,
 33464927,155685007,166770367,156188887,3825136961,
 3602044091,19081066231,18051406831,57128792093,
 7751493599]