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A318727 as a simple table

na(n)
11
21
31
41
53
61
75
83
95
1013
119
1223
1315
1437
1545
1663
17115
18131
19207
20265
21415
22603
23823
241251
251673
262521
273519
285147
297409
3010449
3115225
3221497
3331285
3444719
3564171
3692315
37131619
38190085
39271871
40391189
41560979
42804265
431155977
441656429
452381307
463414847

[1,1,1,1,3,1,5,3,5,13,9,23,15,37,45,63,115,131,
 207,265,415,603,823,1251,1673,2521,3519,5147,7409,
 10449,15225,21497,31285,44719,64171,92315,131619,
 190085,271871,391189,560979,804265,1155977,
 1656429,2381307,3414847]