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A273956 as a simple table

na(n)
11
21
34
421
5131
6921
77083
858493
9512342
104718671
1145407919
12454384447
134710818128
1450453504549
15556929098189
166324139809301
1773759635547026
18882440215196461
1910817350790774790
20135741743078330321
211742225569514045719
2222854838454769204603
23306233932315912508708
244188667660550945874199
2558453992283916684321847
26831867972069915069340899

[1,1,4,21,131,921,7083,58493,512342,4718671,
 45407919,454384447,4710818128,50453504549,
 556929098189,6324139809301,73759635547026,
 882440215196461,10817350790774790,
 135741743078330321,1742225569514045719,
 22854838454769204603,306233932315912508708,
 4188667660550945874199,58453992283916684321847,
 831867972069915069340899]