A290881 - cp's OEIS frontend

A290881 E.g.f. S(x) satisfies: C(x)^2 - S(x)^2 = 1 and C'(x)^2 + S'(x)^2 = 1, where C(x) is the e.g.f. of A290880.

n	a(n)
1	1
2	-1
3	25
4	-1705
5	227665
6	-50333425
7	16655398825
8	-7711225809625
9	4760499335502625
10	-3779764853639958625
11	3752942823715824285625
12	-4556465805050372544735625
13	6641455313355871353308640625
14	-11445605320939175012746492140625
15	23021828780691053491298409381015625
16	-53450977127256739279274500814544765625

[1, -1, 25, -1705, 227665, -50333425, 16655398825, -7711225809625, 4760499335502625, -3779764853639958625, 3752942823715824285625, -4556465805050372544735625, 6641455313355871353308640625, -11445605320939175012746492140625, 23021828780691053491298409381015625, -53450977127256739279274500814544765625]

cp's OEIS Frontend

A290881 E.g.f. S(x) satisfies: C(x)^2 - S(x)^2 = 1 and C'(x)^2 + S'(x)^2 = 1, where C(x) is the e.g.f. of A290880.

Table of values

List of values