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A097073 as a simple table

n a(n)
0 1
1 0
2 4
3 4
4 12
5 20
6 44
7 84
8 172
9 340
10 684
11 1364
12 2732
13 5460
14 10924
15 21844
16 43692
17 87380
18 174764
19 349524
20 699052
21 1398100
22 2796204
23 5592404
24 11184812
25 22369620
26 44739244
27 89478484
28 178956972
29 357913940
30 715827884
31 1431655764
32 2863311532

[1,0,4,4,12,20,44,84,172,340,684,1364,2732,5460,
 10924,21844,43692,87380,174764,349524,699052,
 1398100,2796204,5592404,11184812,22369620,
 44739244,89478484,178956972,357913940,715827884,
 1431655764,2863311532]

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)