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A261755 as a simple table

n a(n)
1 4
2 20
3 19
4 100
5 165
6 353
7 885
8 3548
9 8661
10 21544
11 78052
12 265612
13 786316
14 2171560
15 6063182
16 26625997
17 98070255
18 308244775 

[4,20,19,100,165,353,885,3548,8661,21544,78052,
 265612,786316,2171560,6063182,26625997,98070255,
 308244775]

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Last modified September 15 12:32 EDT 2024. Contains 375938 sequences. (Running on oeis4.)