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A149941 as a simple table

n a(n)
0 1
1 2
2 5
3 15
4 49
5 170
6 623
7 2379
8 9338
9 37576
10 154340
11 644483
12 2730167
13 11708543
14 50746433
15 221991539
16 979080091
17 4349521487
18 19447988041
19 87464143114
20 395422157116
21 1796207086881
22 8194681329515
23 37534191691983
24 172544188383854
25 795842569646633
26 3682111576745304
27 17084850266500176

[1,2,5,15,49,170,623,2379,9338,37576,154340,
 644483,2730167,11708543,50746433,221991539,
 979080091,4349521487,19447988041,87464143114,
 395422157116,1796207086881,8194681329515,
 37534191691983,172544188383854,795842569646633,
 3682111576745304,17084850266500176]

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Last modified July 5 15:26 EDT 2020. Contains 335473 sequences. (Running on oeis4.)