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A376940 as a simple table

na(n)
11
21
33
43
55
65
77
8105
915
1021
11231
121155
131365
142145
151155
1615015
17255255
18255255
19285285
204849845
21255255
224849845
23111546435
24111546435
254849845
26111546435
27111546435
28111546435
293234846615
303234846615
313457939485
32100280245065
333234846615
34100280245065
35100280245065

[1,1,3,3,5,5,7,105,15,21,231,1155,1365,2145,1155,
 15015,255255,255255,285285,4849845,255255,4849845,
 111546435,111546435,4849845,111546435,111546435,
 111546435,3234846615,3234846615,3457939485,
 100280245065,3234846615,100280245065,100280245065]