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A026712 as a simple table

na(n)
01
13
28
320
447
5111
6252
7582
81303
92977
106618
1115028
1233269
1375255
14166152
15374860
16826115
171860407
184094612
199208832
2020248703
2145495079
2299965896
23224440544
24492900919
251106034259
262428024608
275446009600
2811951707547

[1,3,8,20,47,111,252,582,1303,2977,6618,15028,
 33269,75255,166152,374860,826115,1860407,4094612,
 9208832,20248703,45495079,99965896,224440544,
 492900919,1106034259,2428024608,5446009600,
 11951707547]