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A180226 as a simple table

na(n)
10
21
34
426
5144
6836
74784
827496
9157824
10906256
115203264
1229875616
13171535104
14984896576
155654937344
1632468715136
17186424233984
181070384087296
196145778689024
2035286955629056
21202605609406464
221163291993916416
236679224069730304
2438349816218085376

[0,1,4,26,144,836,4784,27496,157824,906256,
 5203264,29875616,171535104,984896576,5654937344,
 32468715136,186424233984,1070384087296,
 6145778689024,35286955629056,202605609406464,
 1163291993916416,6679224069730304,
 38349816218085376]