A305998 - cp's OEIS frontend

A305998 Let K(n) = integral(t=-1,1, t^(2n)(1-t^2)^(2n)/(1+it)^(3n+1) dt) and write K(n) = d(n)Pi - b(n)/a(n) where a(n), b(n), d(n) are positive integers; sequence gives a(n).

n	a(n)
1	1
2	15
3	7
4	495
5	2145
6	69615
7	33915
8	245157
9	2523675
10	150225075
11	60480225
12	187751655
13	26397882693
14	7073942421
15	221214302595
16	26306570659215
17	362711807574025
18	315526198564395
19	154309366568181825
20	495353332454332275
21	13575552922770178725

[1, 15, 7, 495, 2145, 69615, 33915, 245157, 2523675, 150225075, 60480225, 187751655, 26397882693, 7073942421, 221214302595, 26306570659215, 362711807574025, 315526198564395, 154309366568181825, 495353332454332275, 13575552922770178725]

cp's OEIS Frontend

A305998 Let K(n) = integral(t=-1,1, t^(2n)(1-t^2)^(2n)/(1+it)^(3n+1) dt) and write K(n) = d(n)Pi - b(n)/a(n) where a(n), b(n), d(n) are positive integers; sequence gives a(n).

Table of values

List of values

cp's OEIS Frontend

A305998 Let K(n) = integral(t=-1,1, t^(2n)*(1-t^2)^(2n)/(1+it)^(3n+1) dt) and write K(n) = d(n)*Pi - b(n)/a(n) where a(n), b(n), d(n) are positive integers; sequence gives a(n).

Table of values

List of values

A305998 Let K(n) = integral(t=-1,1, t^(2n)(1-t^2)^(2n)/(1+it)^(3n+1) dt) and write K(n) = d(n)Pi - b(n)/a(n) where a(n), b(n), d(n) are positive integers; sequence gives a(n).