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A024024 as a simple table

n a(n)
0 1
1 2
2 7
3 24
4 77
5 238
6 723
7 2180
8 6553
9 19674
10 59039
11 177136
12 531429
13 1594310
14 4782955
15 14348892
16 43046705
17 129140146
18 387420471
19 1162261448
20 3486784381
21 10460353182
22 31381059587
23 94143178804
24 282429536457
25 847288609418

[1,2,7,24,77,238,723,2180,6553,19674,59039,177136,
 531429,1594310,4782955,14348892,43046705,
 129140146,387420471,1162261448,3486784381,
 10460353182,31381059587,94143178804,282429536457,
 847288609418]

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Last modified September 27 09:09 EDT 2020. Contains 337380 sequences. (Running on oeis4.)