A349268 - cp's OEIS frontend

A349268 Generalized Euler numbers, a(n) = n![x^n](sec(9x)(4sin(3x) + 2)cos(3*x)^2).

n	a(n)
0	2
1	12
2	126
3	2160
4	49410
5	1415232
6	48649086
7	1951153920
8	89434106370
9	4611775398912
10	264235243691646
11	16653520425185280
12	1145011717430672130
13	85285640517460180992
14	6841110155700330881406
15	587950108643300554506240
16	53899295662946509072626690
17	5249943672359370392053481472

[2, 12, 126, 2160, 49410, 1415232, 48649086, 1951153920, 89434106370, 4611775398912, 264235243691646, 16653520425185280, 1145011717430672130, 85285640517460180992, 6841110155700330881406, 587950108643300554506240, 53899295662946509072626690, 5249943672359370392053481472]

cp's OEIS Frontend

A349268 Generalized Euler numbers, a(n) = n![x^n](sec(9x)(4sin(3x) + 2)cos(3*x)^2).

Table of values

List of values

cp's OEIS Frontend

A349268 Generalized Euler numbers, a(n) = n!*[x^n](sec(9*x)*(4*sin(3*x) + 2)*cos(3*x)^2).

Table of values

List of values

A349268 Generalized Euler numbers, a(n) = n![x^n](sec(9x)(4sin(3x) + 2)cos(3*x)^2).