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A261315 as a simple table

n a(n)
1 9
2 90
3 657
4 4788
5 27225
6 146619
7 544329
8 2112084
9 3447369
10 28995255
11 9
12 1488185631
13 9
14 73556822205
15 38222232057
16 3321970172244
17 9
18 138479121435807
19 9
20 2209806802214163
21 19711054740199689
22 28570005
23 9
24 15574715941421647071
25 141378216540777225
26 421224309
27 9724427617362202602009

[9,90,657,4788,27225,146619,544329,2112084,
 3447369,28995255,9,1488185631,9,73556822205,
 38222232057,3321970172244,9,138479121435807,9,
 2209806802214163,19711054740199689,28570005,9,
 15574715941421647071,141378216540777225,421224309,
 9724427617362202602009]

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Last modified August 18 15:26 EDT 2024. Contains 375269 sequences. (Running on oeis4.)