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A276900 as a simple table

na(n)
01
11
23
313
475
5541
64683
747293
8545835
97087261
10102247563
111520385010
1223523325304
13380789137336
146467270373536
15115360990236256
162161133759447744
1742490485277902688
18875847933546165968
1918903517993567133752
20426618313415065361204
2110043227358229156346032

[1,1,3,13,75,541,4683,47293,545835,7087261,
 102247563,1520385010,23523325304,380789137336,
 6467270373536,115360990236256,2161133759447744,
 42490485277902688,875847933546165968,
 18903517993567133752,426618313415065361204,
 10043227358229156346032]