login

A204420 as a simple table

na(n)
01
10
21
30
46
53
60
7120
890
915
100
115040
124620
131260
14105
150
16362880
17378000
18132300
1918900
20945
210
2239916800
2345571680
2418711000
253534300
26311850
2710395
280
296227020800
307628100480
313511347840
32794593800
3394594500
345675670
35135135

[1,0,1,0,6,3,0,120,90,15,0,5040,4620,1260,105,0,
 362880,378000,132300,18900,945,0,39916800,
 45571680,18711000,3534300,311850,10395,0,
 6227020800,7628100480,3511347840,794593800,
 94594500,5675670,135135]