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A195980 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 9
5 21
6 52
7 133
8 351
9 948
10 2610
11 7298
12 20672
13 59192
14 171059
15 498275
16 1461437
17 4312300
18 12792342
19 38128354
20 114126797
21 342914278
22 1033914760
23 3127154610
24 9485523742
25 28848101993
26 87948036401
27 268724650863
28 822791384597
29 2524113596369
30 7757247543181
31 23880003051017
32 73627904162143
33 227347168628991
34 702970760225573
35 2176459051318522

[1,1,2,4,9,21,52,133,351,948,2610,7298,20672,
 59192,171059,498275,1461437,4312300,12792342,
 38128354,114126797,342914278,1033914760,
 3127154610,9485523742,28848101993,87948036401,
 268724650863,822791384597,2524113596369,
 7757247543181,23880003051017,73627904162143,
 227347168628991,702970760225573,2176459051318522]

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Last modified July 10 05:30 EDT 2024. Contains 374196 sequences. (Running on oeis4.)