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A143326 Table T(n,k) by antidiagonals. T(n,k) is the number of primitive (=aperiodic) k-ary words with length less than or equal to n (n,k >= 1).

Table of values

n a(n)
1 1
2 2
3 1
4 3
5 4
6 1
7 4
8 9
9 10
10 1
11 5
12 16
13 33
14 22
15 1
16 6
17 25
18 76
19 105
20 52
21 1
22 7
23 36
24 145
25 316
26 345
27 106
28 1
29 8
30 49
31 246
32 745
33 1336
34 1041
35 232
36 1
37 9
38 64
39 385
40 1506
41 3865
42 5356
43 3225
44 472
45 1
46 10
47 81
48 568
49 2737
50 9276
51 19345
52 21736
53 9705
54 976
55 1
56 11
57 100
58 801
59 4600
60 19537
61 55686

List of values

[1, 2, 1, 3, 4, 1, 4, 9, 10, 1, 5, 16, 33, 22, 1, 6, 25, 76, 105, 52, 1, 7, 36, 145, 316, 345, 106, 1, 8, 49, 246, 745, 1336, 1041, 232, 1, 9, 64, 385, 1506, 3865, 5356, 3225, 472, 1, 10, 81, 568, 2737, 9276, 19345, 21736, 9705, 976, 1, 11, 100, 801, 4600, 19537, 55686]