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A202640 as a simple table

n a(n)
1 66
2 172
3 462
4 1278
5 3448
6 9394
7 25526
8 69336
9 188418
10 511960
11 1391014
12 3779620
13 10269688
14 27904004
15 75818836
16 206009414
17 559753846
18 1520922896
19 4132541760
20 11228644088
21 30509661310
22 82898648850
23 225246223922
24 612022778622

[66,172,462,1278,3448,9394,25526,69336,188418,
 511960,1391014,3779620,10269688,27904004,75818836,
 206009414,559753846,1520922896,4132541760,
 11228644088,30509661310,82898648850,225246223922,
 612022778622]

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Last modified June 27 19:31 EDT 2022. Contains 354898 sequences. (Running on oeis4.)