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A107420 as a simple table

n a(n)
0 1
1 54
2 945
3 9240
4 62370
5 324324
6 1387386
7 5096520
8 16563690
9 48668620
10 131405274
11 330142176
12 779502360
13 1743502320
14 3718285560
15 7601828256
16 14966099379
17 28482196050
18 52568991475
19 94362067800
20 165133618650
21 282337298100
22 472506635250
23 775303893000

[1,54,945,9240,62370,324324,1387386,5096520,
 16563690,48668620,131405274,330142176,779502360,
 1743502320,3718285560,7601828256,14966099379,
 28482196050,52568991475,94362067800,165133618650,
 282337298100,472506635250,775303893000]

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Last modified April 20 03:36 EDT 2019. Contains 322294 sequences. (Running on oeis4.)