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A089040 as a simple table

n a(n)
2 1
3 5
4 15
5 47
6 102
7 276
8 578
9 1261
10 2465
11 5362
12 9285
13 18900
14 33269
15 58171
16 99328
17 181514
18 287239
19 502116
20 775710
21 1239710
22 1956334
23 3210736
24 4660786
25 7297823
26 10997235
27 16536803

[1,5,15,47,102,276,578,1261,2465,5362,9285,18900,
 33269,58171,99328,181514,287239,502116,775710,
 1239710,1956334,3210736,4660786,7297823,10997235,
 16536803]

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)