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A298681 as a simple table

na(n)
00
14
24
332
480
5372
61236
74912
817728
967364
10248996
11934080
123476400
1312993364
1448453364
15180907472
16675001760
172519449092
189402095556
1935090331232
20130956433168
21488740993844
221823996357396
236807266805360
2425405026124800
2594812927172324
26353846503607524

[0,4,4,32,80,372,1236,4912,17728,67364,248996,
 934080,3476400,12993364,48453364,180907472,
 675001760,2519449092,9402095556,35090331232,
 130956433168,488740993844,1823996357396,
 6807266805360,25405026124800,94812927172324,
 353846503607524]