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A291264 as a simple table

n a(n)
0 4
1 12
2 36
3 104
4 292
5 804
6 2180
7 5840
8 15492
9 40764
10 106532
11 276792
12 715556
13 1841748
14 4722180
15 12066208
16 30737924
17 78088812
18 197892388
19 500374024
20 1262618148
21 3180066180
22 7995639940
23 20071580784
24 50312160388
25 125942854044
26 314865132324
27 786254598872

[4,12,36,104,292,804,2180,5840,15492,40764,106532,
 276792,715556,1841748,4722180,12066208,30737924,
 78088812,197892388,500374024,1262618148,
 3180066180,7995639940,20071580784,50312160388,
 125942854044,314865132324,786254598872]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)