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A207026 as a simple table

n a(n)
1 6
2 36
3 90
4 252
5 624
6 1350
7 3025
8 6256
9 12788
10 25792
11 50630
12 99012
13 190920
14 365041
15 694038
16 1309524
17 2460150
18 4599952
19 8565768
20 15899422
21 29415965
22 54278252
23 99908040
24 183482116
25 336298170
26 615243752
27 1123669472
28 2049072321
29 3731220822

[6,36,90,252,624,1350,3025,6256,12788,25792,50630,
 99012,190920,365041,694038,1309524,2460150,
 4599952,8565768,15899422,29415965,54278252,
 99908040,183482116,336298170,615243752,1123669472,
 2049072321,3731220822]

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Last modified August 7 22:44 EDT 2020. Contains 336279 sequences. (Running on oeis4.)