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A033887 as a simple table

n a(n)
0 1
1 3
2 13
3 55
4 233
5 987
6 4181
7 17711
8 75025
9 317811
10 1346269
11 5702887
12 24157817
13 102334155
14 433494437
15 1836311903
16 7778742049
17 32951280099
18 139583862445
19 591286729879
20 2504730781961
21 10610209857723
22 44945570212853
23 190392490709135
24 806515533049393
25 3416454622906707

[1,3,13,55,233,987,4181,17711,75025,317811,
 1346269,5702887,24157817,102334155,433494437,
 1836311903,7778742049,32951280099,139583862445,
 591286729879,2504730781961,10610209857723,
 44945570212853,190392490709135,806515533049393,
 3416454622906707]

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Last modified April 19 15:11 EDT 2024. Contains 371794 sequences. (Running on oeis4.)