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A026857 as a simple table

n a(n)
3 1
4 9
5 55
6 287
7 1381
8 6343
9 28313
10 124083
11 537242
12 2307118
13 9852240
14 41910428
15 177807902
16 752981956
17 3184773246
18 13459063660
19 56849094136
20 240047748038
21 1013452871316
22 4278470305930
23 18062827159136
24 76263743441314
25 322033566728056

[1,9,55,287,1381,6343,28313,124083,537242,2307118,
 9852240,41910428,177807902,752981956,3184773246,
 13459063660,56849094136,240047748038,
 1013452871316,4278470305930,18062827159136,
 76263743441314,322033566728056]

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)