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A171278 as a simple table

n a(n)
1 4
2 16
3 62
4 240
5 914
6 3508
7 13297
8 50461
9 191050
10 722932
11 2726415
12 10295319
13 38671908
14 146751022
15 550500089
16 2073212701
17 7808201806
18 29400052201
19 110000818929 

[4,16,62,240,914,3508,13297,50461,191050,722932,
 2726415,10295319,38671908,146751022,550500089,
 2073212701,7808201806,29400052201,110000818929]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)