A012222 - cp's OEIS frontend

A012222 Expansion of e.g.f.: exp(arctan(tanh(x)))=1+x+1/2!x^2-3/3!x^3-15/4!x^4+41/5!x^5...

n	a(n)
0	1
1	1
2	1
3	-3
4	-15
5	41
6	561
7	-1243
8	-40415
9	58001
10	4825121
11	-1956083
12	-866056815
13	-740509639
14	218527875281
15	509169335477
16	-73838559553215
17	-295854887910879
18	32207514779999041
19	189240977761969437

[1, 1, 1, -3, -15, 41, 561, -1243, -40415, 58001, 4825121, -1956083, -866056815, -740509639, 218527875281, 509169335477, -73838559553215, -295854887910879, 32207514779999041, 189240977761969437]

cp's OEIS Frontend

A012222 Expansion of e.g.f.: exp(arctan(tanh(x)))=1+x+1/2!x^2-3/3!x^3-15/4!x^4+41/5!x^5...

Table of values

List of values

cp's OEIS Frontend

A012222 Expansion of e.g.f.: exp(arctan(tanh(x)))=1+x+1/2!*x^2-3/3!*x^3-15/4!*x^4+41/5!*x^5...

Table of values

List of values

A012222 Expansion of e.g.f.: exp(arctan(tanh(x)))=1+x+1/2!x^2-3/3!x^3-15/4!x^4+41/5!x^5...