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A219619 as a simple table

n a(n)
0 1
1 3
2 42
3 546
4 6552
5 78120
6 959760
7 12353040
8 167771520
9 2410611840
10 36654508800
11 589291718400
12 10002032409600
13 178908534604800
14 3366215358105600
15 66496549287168000
16 1376573115101184000
17 29810519036153856000
18 674176353586864128000
19 15896946656727392256000

[1,3,42,546,6552,78120,959760,12353040,167771520,
 2410611840,36654508800,589291718400,
 10002032409600,178908534604800,3366215358105600,
 66496549287168000,1376573115101184000,
 29810519036153856000,674176353586864128000,
 15896946656727392256000]

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Last modified October 15 07:56 EDT 2019. Contains 328026 sequences. (Running on oeis4.)