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A006535 as a simple table

n a(n)
1 1
2 1
3 3
4 10
5 33
6 147
7 620
8 2821
9 12942
10 60639
11 286190
12 1364621
13 6545430
14 31586358
15 153143956
16 745700845
17 3644379397
18 17869651166
19 87877879487
20 433301253231
21 2141584454057
22 10607707971062
23 52646117638427
24 261756764824964
25 1303625908234997
26 6502430891223011
27 32480041218465452
28 162454295068924189
29 813541940383789255
30 4078750395194965720

[1,1,3,10,33,147,620,2821,12942,60639,286190,
 1364621,6545430,31586358,153143956,745700845,
 3644379397,17869651166,87877879487,433301253231,
 2141584454057,10607707971062,52646117638427,
 261756764824964,1303625908234997,6502430891223011,
 32480041218465452,162454295068924189,
 813541940383789255,4078750395194965720]

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Last modified July 12 14:24 EDT 2024. Contains 374251 sequences. (Running on oeis4.)