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A291526 as a simple table

n a(n)
1 0
2 0
3 4
4 20
5 68
6 196
7 516
8 1284
9 3076
10 7172
11 16388
12 36868
13 81924
14 180228
15 393220
16 851972
17 1835012
18 3932164
19 8388612
20 17825796
21 37748740
22 79691780
23 167772164
24 352321540
25 738197508
26 1543503876
27 3221225476
28 6710886404
29 13958643716
30 28991029252
31 60129542148

[0,0,4,20,68,196,516,1284,3076,7172,16388,36868,
 81924,180228,393220,851972,1835012,3932164,
 8388612,17825796,37748740,79691780,167772164,
 352321540,738197508,1543503876,3221225476,
 6710886404,13958643716,28991029252,60129542148]

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Last modified May 8 02:29 EDT 2024. Contains 372317 sequences. (Running on oeis4.)