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A161204 as a simple table

n a(n)
0 2
1 -1
2 -1
3 1
4 3
5 1
6 3
7 9
8 19
9 33
10 67
11 137
12 275
13 545
14 1091
15 2185
16 4371
17 8737
18 17475
19 34953
20 69907
21 139809
22 279619
23 559241
24 1118483
25 2236961
26 4473923
27 8947849
28 17895699
29 35791393
30 71582787
31 143165577
32 286331155
33 572662305
34 1145324611
35 2290649225
36 4581298451
37 9162596897

[2,-1,-1,1,3,1,3,9,19,33,67,137,275,545,1091,2185,
 4371,8737,17475,34953,69907,139809,279619,559241,
 1118483,2236961,4473923,8947849,17895699,35791393,
 71582787,143165577,286331155,572662305,1145324611,
 2290649225,4581298451,9162596897]

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)