A337355 - cp's OEIS frontend

A337355 a(n) is the denominator of Product_{i=0..n-1} (n-i)^((-1)^ceiling(i/2)).

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	5
7	5
8	63
9	56
10	4
11	225
12	77
13	1232
14	312
15	65
16	2695
17	1408
18	14144
19	9945
20	92169
21	53504
22	28288
23	41769
24	370139
25	447488
26	217600
27	502775
28	1427679
29	2684928
30	2524160
31	10414625
32	132774147
33	443908096
34	2375680
35	1168520925
36	3129357
37	18644140032
38	35160064
39	1108596775
40	2318853537

[1, 1, 2, 3, 6, 5, 5, 63, 56, 4, 225, 77, 1232, 312, 65, 2695, 1408, 14144, 9945, 92169, 53504, 28288, 41769, 370139, 447488, 217600, 502775, 1427679, 2684928, 2524160, 10414625, 132774147, 443908096, 2375680, 1168520925, 3129357, 18644140032, 35160064, 1108596775, 2318853537]

cp's OEIS Frontend

A337355 a(n) is the denominator of Product_{i=0..n-1} (n-i)^((-1)^ceiling(i/2)).

Table of values

List of values