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A074693 as a simple table

na(n)
11
22
33
45
59
615
723
845
969
10113
11225
12345
13521
141041
151733
163465
174905
187497
1911529
2018009
2129097
2247817
2371577
24114777
25184761
26307881
27482841
28804573
291212813
301854333
312993517
324953069
337752429
3412826269
3521376953
3634207353
3755027593
3891712493
39152705493

[1,2,3,5,9,15,23,45,69,113,225,345,521,1041,1733,
 3465,4905,7497,11529,18009,29097,47817,71577,
 114777,184761,307881,482841,804573,1212813,
 1854333,2993517,4953069,7752429,12826269,21376953,
 34207353,55027593,91712493,152705493]