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A047028 as a simple table

n a(n)
0 1
1 4
2 14
3 48
4 170
5 611
6 2214
7 8135
8 30171
9 112589
10 423114
11 1598998
12 6068246
13 23125097
14 88441638
15 339234219
16 1304756453
17 5030574435
18 19436510637
19 75241443220
20 291780678294
21 1133270649257
22 4407906226851
23 17167267446803

[1,4,14,48,170,611,2214,8135,30171,112589,423114,
 1598998,6068246,23125097,88441638,339234219,
 1304756453,5030574435,19436510637,75241443220,
 291780678294,1133270649257,4407906226851,
 17167267446803]

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Last modified April 23 01:19 EDT 2024. Contains 371906 sequences. (Running on oeis4.)