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A236011 as a simple table

n a(n)
1 81
2 306
3 1276
4 4672
5 18784
6 70688
7 278352
8 1062192
9 4143280
10 15915216
11 61792048
12 238127760
13 922461744
14 3560485008
15 13777495472
16 53218656784
17 205822482224
18 795331807888
19 3075135853232
20 11884984533264
21 45947260928560

[81,306,1276,4672,18784,70688,278352,1062192,
 4143280,15915216,61792048,238127760,922461744,
 3560485008,13777495472,53218656784,205822482224,
 795331807888,3075135853232,11884984533264,
 45947260928560]

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Last modified August 17 08:02 EDT 2022. Contains 356184 sequences. (Running on oeis4.)