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A107659 as a simple table

n a(n)
0 1
1 4
2 10
3 24
4 52
5 112
6 232
7 480
8 976
9 1984
10 4000
11 8064
12 16192
13 32512
14 65152
15 130560
16 261376
17 523264
18 1047040
19 2095104
20 4191232
21 8384512
22 16771072
23 33546240
24 67096576
25 134201344
26 268410880
27 536838144
28 1073692672
29 2147418112

[1,4,10,24,52,112,232,480,976,1984,4000,8064,
 16192,32512,65152,130560,261376,523264,1047040,
 2095104,4191232,8384512,16771072,33546240,
 67096576,134201344,268410880,536838144,1073692672,
 2147418112]

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Last modified May 23 11:05 EDT 2019. Contains 323513 sequences. (Running on oeis4.)