login

A156991 as a simple table

na(n)
01
10
21
30
42
56
60
76
824
960
100
1124
12120
13360
14840
150
16120
17720
182520
196720
2015120
210
22720
235040
2420160
2560480
26151200
27332640
280
295040
3040320
31181440
32604800
331663200
343991680
358648640
360
3740320
38362880
391814400
406652800
4119958400
4251891840
43121080960
44259459200

[1,0,1,0,2,6,0,6,24,60,0,24,120,360,840,0,120,720,
 2520,6720,15120,0,720,5040,20160,60480,151200,
 332640,0,5040,40320,181440,604800,1663200,3991680,
 8648640,0,40320,362880,1814400,6652800,19958400,
 51891840,121080960,259459200]