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A330886 as a simple table

na(n)
00
12
26
316
438
588
6196
7432
8930
91992
104204
118848
1218428
1338320
1479080
15163040
16334214
17684696
181396516
192847280
205785012
2111750928
2223803512
2348210336
2497426708
25196865488
26397086200
27800882848
281612955736
293248291552
306533903248
3113142446784
3226409360962
3353067656712
34106550428268
35213931086224

[0,2,6,16,38,88,196,432,930,1992,4204,8848,18428,
 38320,79080,163040,334214,684696,1396516,2847280,
 5785012,11750928,23803512,48210336,97426708,
 196865488,397086200,800882848,1612955736,
 3248291552,6533903248,13142446784,26409360962,
 53067656712,106550428268,213931086224]