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A273688
as a simple table
n
a(n)
0
1
1
5
2
17
3
49
4
261
5
1081
6
3993
7
15521
8
61921
9
248613
10
997825
11
3981665
12
15954309
13
63723117
14
255045061
15
1019793809
[1,5,17,49,261,1081,3993,15521,61921,248613, 997825,3981665,15954309,63723117,255045061, 1019793809]
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Last modified August 18 18:17 EDT 2024. Contains 375273 sequences. (Running on oeis4.)