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A077855 as a simple table

na(n)
01
13
26
311
420
536
664
7113
8199
9350
10615
111080
121896
133328
145841
1510251
1617990
1731571
1855404
1997228
20170624
21299425
22525455
23922110
241618191
252839728
264983376
278745216
2815346785
2926931731
3047261894
3182938843
32145547524
33255418100
34448227520
35786584465

[1,3,6,11,20,36,64,113,199,350,615,1080,1896,3328,
 5841,10251,17990,31571,55404,97228,170624,299425,
 525455,922110,1618191,2839728,4983376,8745216,
 15346785,26931731,47261894,82938843,145547524,
 255418100,448227520,786584465]