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A216241 as a simple table

na(n)
01
12
24
38
416
532
662
7124
8236
9472
10890
111780
123340
136680
1412502
1525004
1646732
1793464
18174554
19349108
20651740
211303480
222432918
234865836
249080956
2518161912
2633892954
2767785908
28126494956
29252989912
30472095062
31944190124
321761901676
333523803352
346575544410
3513151088820

[1,2,4,8,16,32,62,124,236,472,890,1780,3340,6680,
 12502,25004,46732,93464,174554,349108,651740,
 1303480,2432918,4865836,9080956,18161912,33892954,
 67785908,126494956,252989912,472095062,944190124,
 1761901676,3523803352,6575544410,13151088820]