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A180664 as a simple table

na(n)
00
12
28
323
463
5167
6440
71154
83024
97919
1020735
1154287
12142128
13372098
14974168
152550407
166677055
1717480759
1845765224
19119814914
20313679520
21821223647
222149991423
235628750623
2414736260448
2538580030722
26101003831720

[0,2,8,23,63,167,440,1154,3024,7919,20735,54287,
 142128,372098,974168,2550407,6677055,17480759,
 45765224,119814914,313679520,821223647,2149991423,
 5628750623,14736260448,38580030722,101003831720]