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A030909 as a simple table

n a(n)
1 2
2 4
3 14
4 57
5 285
6 1712
7 11989
8 95919
9 863279
10 8632798
11 94960779
12 1139529348
13 14813881536
14 207394341513
15 3110915122698
16 49774641963168
17 846168913373870
18 15231040440729667
19 289389768373863686
20 5787795367477273728 

[2,4,14,57,285,1712,11989,95919,863279,8632798,
 94960779,1139529348,14813881536,207394341513,
 3110915122698,49774641963168,846168913373870,
 15231040440729667,289389768373863686,
 5787795367477273728]

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Last modified June 9 05:56 EDT 2024. Contains 373227 sequences. (Running on oeis4.)