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A178961 as a simple table

na(n)
11
23
35
49
515
623
741
861
9117
10165
11343
12475
131049
141397
153267
164275
1710419
1813231
1933545
2041965
21109499
22133895
23359367
24434123
251189795
261412351
273952757
284646449
2913211071
3015318819
3144260077
3250916453
33148927917
34169476849

[1,3,5,9,15,23,41,61,117,165,343,475,1049,1397,
 3267,4275,10419,13231,33545,41965,109499,133895,
 359367,434123,1189795,1412351,3952757,4646449,
 13211071,15318819,44260077,50916453,148927917,
 169476849]