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A226311 as a simple table

na(n)
02
11
25
310
420
540
677
7157
8314
9628
101256
112509
125021
1310042
1420084
1540168
1680333
17160669
18321338
19642676
201285352
212570701
225141405
2310282810
2420565620
2541131240
2682262477
27164524957
28329049914
29658099828
301316199656
312632399309
325264798621
3310529597242
3421059194484
3542118388968
3684236777933
37168473555869

[2,1,5,10,20,40,77,157,314,628,1256,2509,5021,
 10042,20084,40168,80333,160669,321338,642676,
 1285352,2570701,5141405,10282810,20565620,
 41131240,82262477,164524957,329049914,658099828,
 1316199656,2632399309,5264798621,10529597242,
 21059194484,42118388968,84236777933,168473555869]