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A196280 as a simple table

n a(n)
0 1
1 80
2 3520
3 112640
4 2928640
5 65601536
6 1312030720
7 23991418880
8 407854120960
9 6525665935360
10 99190122217472
11 1442765414072320
12 20198715797012480
13 273459536944168960
14 3594039628409077760
15 46003707243636195328
16 575046340545452441600
17 7035861107850241638400

[1,80,3520,112640,2928640,65601536,1312030720,
 23991418880,407854120960,6525665935360,
 99190122217472,1442765414072320,20198715797012480,
 273459536944168960,3594039628409077760,
 46003707243636195328,575046340545452441600,
 7035861107850241638400]

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Last modified July 30 02:02 EDT 2014. Contains 245051 sequences.