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A254144 as a simple table

n a(n)
0 21
1 56
2 196
3 812
4 3724
5 18236
6 93436
7 494732
8 2685004
9 14851676
10 83384476
11 473755052
12 2717541484
13 15709845116
14 91395715516
15 534498925772
16 3139343105164
17 18504595174556
18 109397060622556
19 648335998054892
20 3850205790608044

[21,56,196,812,3724,18236,93436,494732,2685004,
 14851676,83384476,473755052,2717541484,
 15709845116,91395715516,534498925772,
 3139343105164,18504595174556,109397060622556,
 648335998054892,3850205790608044]

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)