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A007568 as a simple table

na(n)
04
13
23
311
435
5395
613859
75474699
875873867299
9415386585433442699
1031516986660961757816520267299
1113091733472248265157675672660811061946713442699
12412611989213715130181341760777978491100613491478334525377331427960520267299

[4,3,3,11,35,395,13859,5474699,75873867299,
 415386585433442699,31516986660961757816520267299,
 13091733472248265157675672660811061946713442699,
 41261198921371513018134176077797849110061349147833\
 4525377331427960520267299]