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A207781 as a simple table

n a(n)
1 9
2 81
3 257
4 791
5 2200
6 6418
7 19041
8 55101
9 160274
10 468839
11 1365913
12 3979457
13 11607265
14 33840611
15 98648082
16 287610828
17 838518475
18 2444629303
19 7127128826
20 20778544998
21 60578554943
22 176612608043
23 514899479923
24 1501152602979

[9,81,257,791,2200,6418,19041,55101,160274,468839,
 1365913,3979457,11607265,33840611,98648082,
 287610828,838518475,2444629303,7127128826,
 20778544998,60578554943,176612608043,514899479923,
 1501152602979]

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Last modified April 18 06:12 EDT 2024. Contains 371769 sequences. (Running on oeis4.)