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A304467 as a simple table

n a(n)
1 4
2 21
3 41
4 117
5 316
6 810
7 2208
8 6012
9 15837
10 42579
11 115618
12 309144
13 829935
14 2246106
15 6045980
16 16264045
17 43945153
18 118607081
19 319754491
20 863718047
21 2333646132
22 6300949455
23 17025299379
24 46023642233
25 124382811126
26 336236258224

[4,21,41,117,316,810,2208,6012,15837,42579,115618,
 309144,829935,2246106,6045980,16264045,43945153,
 118607081,319754491,863718047,2333646132,
 6300949455,17025299379,46023642233,124382811126,
 336236258224]

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Last modified August 10 05:10 EDT 2024. Contains 375044 sequences. (Running on oeis4.)