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A100236 as a simple table

n a(n)
0 1
1 4
2 26
3 139
4 726
5 3774
6 19601
7 101784
8 528526
9 2744419
10 14250626
11 73997554
12 384238401
13 1995189564
14 10360186226
15 53796120699
16 279340789726
17 1450500069334
18 7531841136401
19 39109705751344
20 203080369893126

[1,4,26,139,726,3774,19601,101784,528526,2744419,
 14250626,73997554,384238401,1995189564,
 10360186226,53796120699,279340789726,
 1450500069334,7531841136401,39109705751344,
 203080369893126]

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)