A320519 - cp's OEIS frontend

A320519 a(n) = 2n^ncos(narcsin(sqrt(4n^2-1)/(2*n))) for n > 0 and a(0) = 2.

n	a(n)
0	2
1	1
2	-7
3	-26
4	449
5	3001
6	-81863
7	-790271
8	29441537
9	371653678
10	-17549650999
11	-273657699479
12	15647990550337
13	290477695697281
14	-19502273553366631
15	-419946226750915874
16	32375641678132277249
17	793304922112119056161
18	-69057016330377072921047
19	-1897210272812469982747199

[2, 1, -7, -26, 449, 3001, -81863, -790271, 29441537, 371653678, -17549650999, -273657699479, 15647990550337, 290477695697281, -19502273553366631, -419946226750915874, 32375641678132277249, 793304922112119056161, -69057016330377072921047, -1897210272812469982747199]

cp's OEIS Frontend

A320519 a(n) = 2n^ncos(narcsin(sqrt(4n^2-1)/(2*n))) for n > 0 and a(0) = 2.

Table of values

List of values

cp's OEIS Frontend

A320519 a(n) = 2*n^n*cos(n*arcsin(sqrt(4*n^2-1)/(2*n))) for n > 0 and a(0) = 2.

Table of values

List of values

A320519 a(n) = 2n^ncos(narcsin(sqrt(4n^2-1)/(2*n))) for n > 0 and a(0) = 2.