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A264218 as a simple table

n a(n)
1 4
2 17
3 56
4 172
5 561
6 1826
7 5880
8 18993
9 61424
10 198472
11 641297
12 2072482
13 6697372
14 21642593
15 69939048
16 226011412
17 730364961
18 2360204994
19 7627103920
20 24647309729
21 79648825312
22 257388562256
23 831762066401
24 2687874415810
25 8685980265204

[4,17,56,172,561,1826,5880,18993,61424,198472,
 641297,2072482,6697372,21642593,69939048,
 226011412,730364961,2360204994,7627103920,
 24647309729,79648825312,257388562256,831762066401,
 2687874415810,8685980265204]

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Last modified June 25 15:24 EDT 2024. Contains 373705 sequences. (Running on oeis4.)