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A337860 as a simple table

na(n)
13
25
313
427
565
6145
7361
8855
92163
105303
1113419
1233195
1384159
14210765
15536871
161356153
173466533
188799247
1922541583
2057428441
21147423495
22376838119
23969292869
242484478265
256401330591
2616445203213
2742434086359
28109225591309
29282209330237

[3,5,13,27,65,145,361,855,2163,5303,13419,33195,
 84159,210765,536871,1356153,3466533,8799247,
 22541583,57428441,147423495,376838119,969292869,
 2484478265,6401330591,16445203213,42434086359,
 109225591309,282209330237]