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A131993 as a simple table

n a(n)
1 63
2 364
3 3906
4 19608
5 177156
6 402234
7 1508598
8 2613660
9 6728904
10 21243690
11 29583456
12 71270178
13 118752606
14 150508644
15 234330768
16 426237714
17 727250580
18 858672906
19 1370581548
20 1830004056
21 2101864254
22 3116505840
23 3987077724

[63,364,3906,19608,177156,402234,1508598,2613660,
 6728904,21243690,29583456,71270178,118752606,
 150508644,234330768,426237714,727250580,858672906,
 1370581548,1830004056,2101864254,3116505840,
 3987077724]

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Last modified May 7 00:25 EDT 2024. Contains 372298 sequences. (Running on oeis4.)