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A266791 as a simple table

na(n)
01
13
27
314
429
558
6117
7234
8468
9937
101875
113751
127502
1315005
1430010
1560021
16120042
17240085
18480170
19960341
201920682
213841365
227682730
2315365461
2430730922
2561461845
26122923690
27245847381
28491694762
29983389525
301966779050
313933558101
327867116202

[1,3,7,14,29,58,117,234,468,937,1875,3751,7502,
 15005,30010,60021,120042,240085,480170,960341,
 1920682,3841365,7682730,15365461,30730922,
 61461845,122923690,245847381,491694762,983389525,
 1966779050,3933558101,7867116202]