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A361257 as a simple table

na(n)
01
12
25
316
429
566
6127
7512
8737
91090
101541
113312
124369
137658
1412209
1565536
1683537
17105282
18130987
19167600
20203701
21254122
22313259
23649728
24766201
25912626
261079027
271778896
282071469
293081570
304329151
3133554432
3239135425
3345436546
3452524221
3560511536

[1,2,5,16,29,66,127,512,737,1090,1541,3312,4369,
 7658,12209,65536,83537,105282,130987,167600,
 203701,254122,313259,649728,766201,912626,1079027,
 1778896,2071469,3081570,4329151,33554432,39135425,
 45436546,52524221,60511536]