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A269635 as a simple table

n a(n)
1 4
2 16
3 60
4 221
5 796
6 2828
7 9928
8 34537
9 119236
10 409098
11 1396288
12 4744671
13 16062116
14 54199810
15 182382428
16 612236251
17 2050883956
18 6857469364
19 22892085300
20 76311433969
21 254067536796
22 844941922160
23 2807225267056
24 9318543171653

[4,16,60,221,796,2828,9928,34537,119236,409098,
 1396288,4744671,16062116,54199810,182382428,
 612236251,2050883956,6857469364,22892085300,
 76311433969,254067536796,844941922160,
 2807225267056,9318543171653]

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Last modified June 14 15:00 EDT 2024. Contains 373400 sequences. (Running on oeis4.)