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A231297 as a simple table

n a(n)
1 4
2 16
3 69
4 301
5 1414
6 6850
7 33316
8 162796
9 797293
10 3906788
11 19152603
12 93902795
13 460455941
14 2257842932
15 11071788203
16 54292311074
17 266234310441
18 1305534117780
19 6401974363527
20 31393453449193
21 153944680060888
22 754901179958837

[4,16,69,301,1414,6850,33316,162796,797293,
 3906788,19152603,93902795,460455941,2257842932,
 11071788203,54292311074,266234310441,
 1305534117780,6401974363527,31393453449193,
 153944680060888,754901179958837]

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)