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A207855 as a simple table

n a(n)
1 15
2 225
3 1071
4 7289
5 44121
6 279219
7 1737981
8 10873197
9 67902955
10 424387041
11 2651860269
12 16571735565
13 103552803445
14 647076103565
15 4043412030973
16 25266419946873
17 157884983254865
18 986593269768561
19 6165025417156933

[15,225,1071,7289,44121,279219,1737981,10873197,
 67902955,424387041,2651860269,16571735565,
 103552803445,647076103565,4043412030973,
 25266419946873,157884983254865,986593269768561,
 6165025417156933]

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Last modified July 26 20:29 EDT 2021. Contains 346295 sequences. (Running on oeis4.)