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A279668 as a simple table

na(n)
01
12
25
310
421
542
685
7186
8261
9746
101365
112746
125381
1310986
1421589
1543706
1687301
17179946
18333141
19699066
201398021
213074794
224527189
2311184826
2422369541
2546055146
2685005653
27178956986
28357913861
29783215338
301094980693
313131812538
325726360837
3311793055466

[1,2,5,10,21,42,85,186,261,746,1365,2746,5381,
 10986,21589,43706,87301,179946,333141,699066,
 1398021,3074794,4527189,11184826,22369541,
 46055146,85005653,178956986,357913861,783215338,
 1094980693,3131812538,5726360837,11793055466]