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A278644 as a simple table

n a(n)
0 1
1 1
2 4
3 17
4 95
5 649
6 5423
7 53345
8 604570
9 7744990
10 110596370
11 1740967790
12 29943077149
13 558541778035
14 11229820022013
15 242071441524480
16 5568954194762675
17 136181762611151941
18 3527284819779421843
19 96465042641948254298
20 2777679881076121497601

[1,1,4,17,95,649,5423,53345,604570,7744990,
 110596370,1740967790,29943077149,558541778035,
 11229820022013,242071441524480,5568954194762675,
 136181762611151941,3527284819779421843,
 96465042641948254298,2777679881076121497601]

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Last modified April 24 06:24 EDT 2024. Contains 371918 sequences. (Running on oeis4.)