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A286191 as a simple table

n a(n)
1 3
2 13
3 55
4 233
5 971
6 3981
7 16143
8 65041
9 261139
10 1046549
11 4190231
12 16769049
13 67092507
14 268402717
15 1073676319
16 4294836257
17 17179607075
18 68718952485
19 274876858407
20 1099509530665
21 4398042316843
22 17592177655853
23 70368727400495
24 281474943156273
25 1125899839733811

[3,13,55,233,971,3981,16143,65041,261139,1046549,
 4190231,16769049,67092507,268402717,1073676319,
 4294836257,17179607075,68718952485,274876858407,
 1099509530665,4398042316843,17592177655853,
 70368727400495,281474943156273,1125899839733811]

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Last modified April 25 11:30 EDT 2024. Contains 371967 sequences. (Running on oeis4.)