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A261236 as a simple table

na(n)
00
11
23
37
416
540
6104
7279
8758
92071
105678
1115609
1243035
13119139
14331616
15928572
162614743
177396880
1820999683
1959784414
20170615755
21488073987
221399625614
234023315793
2411590737827
2533452982391

[0,1,3,7,16,40,104,279,758,2071,5678,15609,43035,
 119139,331616,928572,2614743,7396880,20999683,
 59784414,170615755,488073987,1399625614,
 4023315793,11590737827,33452982391]