login

A293021 as a simple table

na(n)
01
11
24
324
4192
51880
621312
7266504
83469312
942094656
10297625600
11-8727514752
12-659406274560
13-31019532622208
14-1314656227540992
15-54314985911216640
16-2248955319931633664
17-94369141109824233472
18-4028982346754921594880
19-175032005028072692797440

[1,1,4,24,192,1880,21312,266504,3469312,42094656,
 297625600,-8727514752,-659406274560,
 -31019532622208,-1314656227540992,
 -54314985911216640,-2248955319931633664,
 -94369141109824233472,-4028982346754921594880,
 -175032005028072692797440]