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A121344 as a simple table

n a(n)
1 0
2 0
3 144
4 2460
5 3168
6 32052
7 77976
8 420444
9 1310088
10 5655204
11 19291968
12 76066992
13 268063080
14 1011675420
15 3606884688
16 13288161216
17 47524261464
18 172579279812
19 616843377408
20 2219476633200
21 7915941196128

[0,0,144,2460,3168,32052,77976,420444,1310088,
 5655204,19291968,76066992,268063080,1011675420,
 3606884688,13288161216,47524261464,172579279812,
 616843377408,2219476633200,7915941196128]

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Last modified April 16 12:52 EDT 2024. Contains 371711 sequences. (Running on oeis4.)