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A111644 as a simple table

n a(n)
0 1
1 -6
2 29
3 -124
4 501
5 -1962
6 7545
7 -28696
8 108393
9 -407662
10 1528981
11 -5724500
12 21408221
13 -80003026
14 298832369
15 -1115878064
16 4166011601
17 -15551383382
18 58047283725
19 -216656490156
20 808623915973
21 -3017948390522
22 11263433318761
23 -42036421446600
24 156883789264441

[1,-6,29,-124,501,-1962,7545,-28696,108393,
 -407662,1528981,-5724500,21408221,-80003026,
 298832369,-1115878064,4166011601,-15551383382,
 58047283725,-216656490156,808623915973,
 -3017948390522,11263433318761,-42036421446600,
 156883789264441]

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Last modified June 18 23:16 EDT 2021. Contains 345125 sequences. (Running on oeis4.)