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A278728 as a simple table

n a(n)
1 6
2 152
3 1947
4 17352
5 121520
6 712406
7 3633649
8 16547278
9 68531079
10 261693631
11 931194981
12 3113638802
13 9849622993
14 29642927267
15 85271613063
16 235393492799
17 625708778733
18 1606286648601
19 3992748071821
20 9631887926896
21 22595573914587

[6,152,1947,17352,121520,712406,3633649,16547278,
 68531079,261693631,931194981,3113638802,
 9849622993,29642927267,85271613063,235393492799,
 625708778733,1606286648601,3992748071821,
 9631887926896,22595573914587]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)