A295759 - cp's OEIS frontend

A295759 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2k)arctan(x) ).

n	a(n)
0	1
1	2
2	8
3	50
4	432
5	4690
6	61208
7	933090
8	16268640
9	319249698
10	6963071784
11	167093039122
12	4374954323216
13	124108887889522
14	3791902447022648
15	124138462767883202
16	4335205955612166848
17	160865445090615444546
18	6320573384125953811016
19	262147404448177963790834
20	11445191965935999115186288

[1, 2, 8, 50, 432, 4690, 61208, 933090, 16268640, 319249698, 6963071784, 167093039122, 4374954323216, 124108887889522, 3791902447022648, 124138462767883202, 4335205955612166848, 160865445090615444546, 6320573384125953811016, 262147404448177963790834, 11445191965935999115186288]

cp's OEIS Frontend

A295759 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2k)arctan(x) ).

Table of values

List of values

cp's OEIS Frontend

A295759 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2*k)*arctan(x) ).

Table of values

List of values

A295759 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2k)arctan(x) ).