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A290809 as a simple table

n a(n)
0 0
1 4
2 32
3 32
4 1404
5 13409
6 97444
7 215093
8 3509265
9 15038867
10 257160509
11 1669536754
12 5624190240
13 19465477441
14 310132508662
15 310132508662
16 28795501568320
17 228193084985926
18 1623976168909168
19 8137630560550964
20 76531001672789822
21 555284599458461828

[0,4,32,32,1404,13409,97444,215093,3509265,
 15038867,257160509,1669536754,5624190240,
 19465477441,310132508662,310132508662,
 28795501568320,228193084985926,1623976168909168,
 8137630560550964,76531001672789822,
 555284599458461828]

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Last modified October 20 07:33 EDT 2019. Contains 328252 sequences. (Running on oeis4.)