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A376751 as a simple table

na(n)
12
25
313
429
561
6127
7257
8521
91049
102111
114229
128461
1316927
1433857
1567723
16135449
17270913
18541831
191083689
202167393
214334791
228669593
2317339197
2434678421
2569356857
26138713717
27277427441
28554854889
291109709791
302219419597
314438839259
328877678527
3317755357069
3435510714159
3571021428351
36142042856719

[2,5,13,29,61,127,257,521,1049,2111,4229,8461,
 16927,33857,67723,135449,270913,541831,1083689,
 2167393,4334791,8669593,17339197,34678421,
 69356857,138713717,277427441,554854889,1109709791,
 2219419597,4438839259,8877678527,17755357069,
 35510714159,71021428351,142042856719]