A366109 - cp's OEIS frontend

A366109 a(n) = floor(n!(3floor(n/2)!ceiling(n/2)! + 3floor((n+2)/2)!ceiling((n-2)/2)! - 6floor(n/2)!*ceiling((n-2)/2)!)^(-1)).

n	a(n)
3	1
4	1
5	2
6	4
7	7
8	13
9	26
10	46
11	92
12	168
13	333
14	616
15	1225
16	2288
17	4558
18	8580
19	17107
20	32413
21	64664
22	123170
23	245832
24	470288
25	938943
26	1802770
27	3600207
28	6933733
29	13849778
30	26744400
31	53429368
32	103411680
33	206621384
34	400720260
35	800747232
36	1555737480
37	3109074130
38	6050090200
39	12091800773

[1, 1, 2, 4, 7, 13, 26, 46, 92, 168, 333, 616, 1225, 2288, 4558, 8580, 17107, 32413, 64664, 123170, 245832, 470288, 938943, 1802770, 3600207, 6933733, 13849778, 26744400, 53429368, 103411680, 206621384, 400720260, 800747232, 1555737480, 3109074130, 6050090200, 12091800773]

cp's OEIS Frontend

A366109 a(n) = floor(n!(3floor(n/2)!ceiling(n/2)! + 3floor((n+2)/2)!ceiling((n-2)/2)! - 6floor(n/2)!*ceiling((n-2)/2)!)^(-1)).

Table of values

List of values

cp's OEIS Frontend

A366109 a(n) = floor(n!*(3*floor(n/2)!*ceiling(n/2)! + 3*floor((n+2)/2)!*ceiling((n-2)/2)! - 6*floor(n/2)!*ceiling((n-2)/2)!)^(-1)).

Table of values

List of values

A366109 a(n) = floor(n!(3floor(n/2)!ceiling(n/2)! + 3floor((n+2)/2)!ceiling((n-2)/2)! - 6floor(n/2)!*ceiling((n-2)/2)!)^(-1)).