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A026732 as a simple table

na(n)
01
12
24
39
418
540
680
7176
8352
9769
101538
113343
126686
1314477
1428954
1562505
16125010
17269216
18538432
191157244
202314488
214966260
229932520
2321282622
2442565244
2591096110
26182192220
27389515284
28779030568
291664015246
303328030492

[1,2,4,9,18,40,80,176,352,769,1538,3343,6686,
 14477,28954,62505,125010,269216,538432,1157244,
 2314488,4966260,9932520,21282622,42565244,
 91096110,182192220,389515284,779030568,1664015246,
 3328030492]