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A226548 as a simple table

na(n)
00
15
250
3256
41402
56940
633502
7157279
8725080
93293575
1014789640
1165785991
12290341336
131272947979
145549535668
1524075671345
16104002776564
17447586575256
181919810662952
198210002538205
2035015688030978
21148980204943747
22632466650426456
232679623444793841

[0,5,50,256,1402,6940,33502,157279,725080,3293575,
 14789640,65785991,290341336,1272947979,5549535668,
 24075671345,104002776564,447586575256,
 1919810662952,8210002538205,35015688030978,
 148980204943747,632466650426456,2679623444793841]