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A278601 as a simple table

na(n)
01
13
21
33
41
527
69
7123
897
959
10649
111467
122209
135115
1412617
151019
16673
1742363
1889929
19164347
20360609
21547835
221605705
23463099
2410529953
2531704955
263805257
27303355
2838491297
2982903035
301020414281
3135967995
32241853089
333239525755
34119580489
3520676039163

[1,3,1,3,1,27,9,123,97,59,649,1467,2209,5115,
 12617,1019,673,42363,89929,164347,360609,547835,
 1605705,463099,10529953,31704955,3805257,303355,
 38491297,82903035,1020414281,35967995,241853089,
 3239525755,119580489,20676039163]