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A030017 as a simple table

n a(n)
1 1
2 2
3 7
4 25
5 88
6 311
7 1095
8 3858
9 13591
10 47881
11 168688
12 594289
13 2093693
14 7376120
15 25986209
16 91549913
17 322532092
18 1136286727
19 4003159847
20 14103208628
21 49685873471
22 175044281583
23 616684348614
24 2172590743211
25 7654078700221
26 26965465508072
27 94999850216565

[1,2,7,25,88,311,1095,3858,13591,47881,168688,
 594289,2093693,7376120,25986209,91549913,
 322532092,1136286727,4003159847,14103208628,
 49685873471,175044281583,616684348614,
 2172590743211,7654078700221,26965465508072,
 94999850216565]

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)