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A007800 as a simple table

na(n)
11
22
34
48
516
631
759
8111
9207
10384
11710
121310
132414
144445
158181
1615053
1727693
1850942
1993704
20172356
21317020
22583099
231072495
241972635
253628251
266673404
2712274314
2822575994
2941523738
3076374073
31140473833
32258371673
33475219609
34874065146

[1,2,4,8,16,31,59,111,207,384,710,1310,2414,4445,
 8181,15053,27693,50942,93704,172356,317020,583099,
 1072495,1972635,3628251,6673404,12274314,22575994,
 41523738,76374073,140473833,258371673,475219609,
 874065146]