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A269014 as a simple table

n a(n)
1 0
2 48
3 224
4 2136
5 10976
6 73568
7 390064
8 2291728
9 12190944
10 67387784
11 356115520
12 1906181472
13 9983123936
14 52432319344
15 272227610848
16 1412208727736
17 7276913394080
18 37421599567712
19 191604936958480
20 978880041945808

[0,48,224,2136,10976,73568,390064,2291728,
 12190944,67387784,356115520,1906181472,9983123936,
 52432319344,272227610848,1412208727736,
 7276913394080,37421599567712,191604936958480,
 978880041945808]

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Last modified October 24 05:38 EDT 2021. Contains 348217 sequences. (Running on oeis4.)