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A029929 as a simple table

na(n)
00
12
26
312
424
540
672
7126
8240
9468
10960
112002
124248
139048
1419320
1541190
1687648
17185980
18393552
19830490
201748040
213670464
227690056
2316078702
2433555024
2569905700
26145403232
27301990626
28626350200
291297438888
302684355480
315547667062
3211453247168
3323622321228
3448676297200
35100215904810

[0,2,6,12,24,40,72,126,240,468,960,2002,4248,9048,
 19320,41190,87648,185980,393552,830490,1748040,
 3670464,7690056,16078702,33555024,69905700,
 145403232,301990626,626350200,1297438888,
 2684355480,5547667062,11453247168,23622321228,
 48676297200,100215904810]