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A291384 as a simple table

n a(n)
0 1
1 4
2 14
3 49
4 172
5 604
6 2120
7 7442
8 26124
9 91704
10 321912
11 1130020
12 3966752
13 13924640
14 48880192
15 171585992
16 602324816
17 2114363648
18 7422130912
19 26054187664
20 91459003200
21 321052008000
22 1127001041280
23 3956154502688
24 13887439208896
25 48749604609664

[1,4,14,49,172,604,2120,7442,26124,91704,321912,
 1130020,3966752,13924640,48880192,171585992,
 602324816,2114363648,7422130912,26054187664,
 91459003200,321052008000,1127001041280,
 3956154502688,13887439208896,48749604609664]

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)