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A052870 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 15
5 44
6 128
7 386
8 1179
9 3679
10 11601
11 37030
12 119262
13 387325
14 1266647
15 4168264
16 13791565
17 45856091
18 153134306
19 513403575
20 1727395042
21 5830866601
22 19740613869
23 67014421326
24 228066659185
25 777961702283
26 2659398743509
27 9109015516017
28 31258117755635

[1,1,2,6,15,44,128,386,1179,3679,11601,37030,
 119262,387325,1266647,4168264,13791565,45856091,
 153134306,513403575,1727395042,5830866601,
 19740613869,67014421326,228066659185,777961702283,
 2659398743509,9109015516017,31258117755635]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)