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A299147 as a simple table

na(n)
14
264
3289
4253541929
5499477801
61260747049
714450203681
825391466409
9256221229489
10333456586849
11341122579249
12459926756041
13911087431081
14928731181849
151142288550841
162880002461249
172923070670601
183000305515321
194103999343889
204123226708329
214258977385441

[4,64,289,253541929,499477801,1260747049,
 14450203681,25391466409,256221229489,333456586849,
 341122579249,459926756041,911087431081,
 928731181849,1142288550841,2880002461249,
 2923070670601,3000305515321,4103999343889,
 4123226708329,4258977385441]