login

A002538 as a simple table

na(n)
11
28
358
4444
53708
633984
7341136
83733920
944339040
10568356480
117827719040
12115336085760
131810992556800
1430196376985600
15532953524275200
169927928075161600
17194677319705702400
184008789120817152000
1986495828444928000000
201951566265951948800000
2145958933902500720640000

[1,8,58,444,3708,33984,341136,3733920,44339040,
 568356480,7827719040,115336085760,1810992556800,
 30196376985600,532953524275200,9927928075161600,
 194677319705702400,4008789120817152000,
 86495828444928000000,1951566265951948800000,
 45958933902500720640000]