A295758 - cp's OEIS frontend

A295758 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2k-1)arctan(x) ).

n	a(n)
0	1
1	1
2	3
3	15
4	113
5	1105
6	13219
7	187103
8	3058113
9	56675297
10	1174295267
11	26898243439
12	674916701169
13	18409502066097
14	542373965958595
15	17164148092886207
16	580677914417571585
17	20913258579319759041
18	798876414332323236931
19	32261582928825038942671
20	1373304514339211081661169

[1, 1, 3, 15, 113, 1105, 13219, 187103, 3058113, 56675297, 1174295267, 26898243439, 674916701169, 18409502066097, 542373965958595, 17164148092886207, 580677914417571585, 20913258579319759041, 798876414332323236931, 32261582928825038942671, 1373304514339211081661169]

cp's OEIS Frontend

A295758 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2k-1)arctan(x) ).

Table of values

List of values

cp's OEIS Frontend

A295758 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2*k-1)*arctan(x) ).

Table of values

List of values

A295758 O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2k-1)arctan(x) ).