A012801 - cp's OEIS frontend

A012801 exp(sec(x)arctan(x))=1+x+1/2!x^2+2/3!x^3+5/4!x^4+40/5!*x^5...

n	a(n)
0	1
1	1
2	1
3	2
4	5
5	40
6	205
7	576
8	2473
9	46208
10	475385
11	1293184
12	-2814227
13	309637120
14	5900398725
15	5786437632
16	-532397600303
17	7315622592512
18	273302104270705
19	-347058934743040
20	-68724093821987755
21	483735262691819520

[1, 1, 1, 2, 5, 40, 205, 576, 2473, 46208, 475385, 1293184, -2814227, 309637120, 5900398725, 5786437632, -532397600303, 7315622592512, 273302104270705, -347058934743040, -68724093821987755, 483735262691819520]

cp's OEIS Frontend

A012801 exp(sec(x)arctan(x))=1+x+1/2!x^2+2/3!x^3+5/4!x^4+40/5!*x^5...

Table of values

List of values

cp's OEIS Frontend

A012801 exp(sec(x)*arctan(x))=1+x+1/2!*x^2+2/3!*x^3+5/4!*x^4+40/5!*x^5...

Table of values

List of values

A012801 exp(sec(x)arctan(x))=1+x+1/2!x^2+2/3!x^3+5/4!x^4+40/5!*x^5...