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A207886 as a simple table

n a(n)
1 9
2 81
3 177
4 575
5 1360
6 3106
7 8652
8 22114
9 53620
10 139806
11 360132
12 899952
13 2300016
14 5898082
15 14925674
16 37975776
17 96993892
18 246541258
19 627068300
20 1598281686
21 4067781864
22 10349972204
23 26357799164
24 67101532924
25 170780094962

[9,81,177,575,1360,3106,8652,22114,53620,139806,
 360132,899952,2300016,5898082,14925674,37975776,
 96993892,246541258,627068300,1598281686,
 4067781864,10349972204,26357799164,67101532924,
 170780094962]

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Last modified May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)