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A273954 as a simple table

na(n)
01
11
25
337
4393
55481
695053
71975821
847939601
91330923601
1041629292181
111448989481589
1255561575788953
132327512861252281
14105767732851318749
155182512561142513501
16272391086209524010017
1715287595381259195453089
18912525533175190887597349
1957726267762799335649572549

[1,1,5,37,393,5481,95053,1975821,47939601,
 1330923601,41629292181,1448989481589,
 55561575788953,2327512861252281,
 105767732851318749,5182512561142513501,
 272391086209524010017,15287595381259195453089,
 912525533175190887597349,
 57726267762799335649572549]