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A026776 as a simple table

na(n)
01
12
24
39
419
543
693
7212
8466
91070
102382
115506
1212386
1328800
1465356
15152745
16349183
17819639
181885361
194441719
2010270279
2124269629
2256363319
23133529869
24311255601
25738947515
261727873793
274109314729
289634406661
2922946573863

[1,2,4,9,19,43,93,212,466,1070,2382,5506,12386,
 28800,65356,152745,349183,819639,1885361,4441719,
 10270279,24269629,56363319,133529869,311255601,
 738947515,1727873793,4109314729,9634406661,
 22946573863]