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A002336 as a simple table

na(n)
00
12
26
312
424
540
672
7126
8240
9272
10336
11438
12648
13906
141422
152340
164320
175346
187398
1910668
2017400
2127720
2249896
2393150
24196560
25196656

[0,2,6,12,24,40,72,126,240,272,336,438,648,906,
 1422,2340,4320,5346,7398,10668,17400,27720,49896,
 93150,196560,196656]