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A026720 as a simple table

na(n)
01
11
23
35
413
525
663
7128
8319
9664
101647
113468
128583
1318179
1444941
1595486
16235913
17502130
181240173
192642373
206524919
2113910933
2234346785
2373254357
24180855499
25385819274
26952494047
272032271705
285017037457
2910705592360

[1,1,3,5,13,25,63,128,319,664,1647,3468,8583,
 18179,44941,95486,235913,502130,1240173,2642373,
 6524919,13910933,34346785,73254357,180855499,
 385819274,952494047,2032271705,5017037457,
 10705592360]