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A268409 as a simple table

n a(n)
0 3
1 5
2 26
3 114
4 508
5 2260
6 10056
7 44744
8 199088
9 885840
10 3941536
11 17537824
12 78034368
13 347213120
14 1544921216
15 6874111104
16 30586286848
17 136093369600
18 605546052096
19 2694370947584
20 11988575894528
21 53343045473280
22 237349333682176
23 1056083425675264

[3,5,26,114,508,2260,10056,44744,199088,885840,
 3941536,17537824,78034368,347213120,1544921216,
 6874111104,30586286848,136093369600,605546052096,
 2694370947584,11988575894528,53343045473280,
 237349333682176,1056083425675264]

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Last modified October 23 19:18 EDT 2018. Contains 316530 sequences. (Running on oeis4.)