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A022637 as a simple table

n a(n)
0 1
1 9
2 54
3 273
4 1197
5 4761
6 17577
7 60957
8 200799
9 633007
10 1920510
11 5633667
12 16037700
13 44439840
14 120165858
15 317762553
16 823240341
17 2092864401
18 5228118701
19 12848849154
20 31100190048
21 74208885351
22 174708121455
23 406132690635
24 932871440739
25 2118595079790
26 4759875472491

[1,9,54,273,1197,4761,17577,60957,200799,633007,
 1920510,5633667,16037700,44439840,120165858,
 317762553,823240341,2092864401,5228118701,
 12848849154,31100190048,74208885351,174708121455,
 406132690635,932871440739,2118595079790,
 4759875472491]

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Last modified June 9 16:35 EDT 2024. Contains 373248 sequences. (Running on oeis4.)