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A263759 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 19
6 50
7 165
8 476
9 1543
10 4544
11 14108
12 41666
13 127313
14 379674
15 1152233
16 3448844
17 10424890
18 31290646
19 94453041
20 284071264
21 857114281
22 2581411140
23 7789677889
24 23486717204
25 70901078303
26 213968862304
27 646246694302

[0,0,1,4,19,50,165,476,1543,4544,14108,41666,
 127313,379674,1152233,3448844,10424890,31290646,
 94453041,284071264,857114281,2581411140,
 7789677889,23486717204,70901078303,213968862304,
 646246694302]

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Last modified April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)