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A208902 as a simple table

na(n)
12
26
314
434
578
6182
7414
8942
92110
104702
1110366
1222718
1349406
14106878
15229886
16492286
171049598
182229758
194720638
209964542
2120975614
2244046334
2392282878
24192950270
25402669566
26838885374
271744863230
283623927806
297516258302
3015569354750
3132212385790

[2,6,14,34,78,182,414,942,2110,4702,10366,22718,
 49406,106878,229886,492286,1049598,2229758,
 4720638,9964542,20975614,44046334,92282878,
 192950270,402669566,838885374,1744863230,
 3623927806,7516258302,15569354750,32212385790]