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A291220 as a simple table

na(n)
01
11
22
34
47
515
627
755
8101
9199
10370
11718
121347
132595
144898
159397
1617803
1734066
1864682
19123561
20234917
21448289
22852979
231626689
243096695
255903316
2611241426
2721424775
2840805833
2977759648
30148118585
31282229961
32537636210
331024373916
341951472023
353718072991

[1,1,2,4,7,15,27,55,101,199,370,718,1347,2595,
 4898,9397,17803,34066,64682,123561,234917,448289,
 852979,1626689,3096695,5903316,11241426,21424775,
 40805833,77759648,148118585,282229961,537636210,
 1024373916,1951472023,3718072991]