A087547 - cp's OEIS frontend

A087547 a(n) = n!2^(n+1) (Integral_{x = 0..1} 1/(1+x^2)^(n+1) dx) - Pi(2n)!/(2^(n+1)*n!).

n	a(n)
0	0
1	1
2	4
3	22
4	160
5	1464
6	16224
7	211632
8	3179520
9	54092160
10	1028113920
11	21594021120
12	496702402560
13	12418039065600
14	335293281792000
15	9723592350259200
16	301432670532403200
17	9947299050359193600
18	348155822449999872000
19	12881771833023700992000
20	502389223133024747520000

[0, 1, 4, 22, 160, 1464, 16224, 211632, 3179520, 54092160, 1028113920, 21594021120, 496702402560, 12418039065600, 335293281792000, 9723592350259200, 301432670532403200, 9947299050359193600, 348155822449999872000, 12881771833023700992000, 502389223133024747520000]

cp's OEIS Frontend

A087547 a(n) = n!2^(n+1) (Integral_{x = 0..1} 1/(1+x^2)^(n+1) dx) - Pi(2n)!/(2^(n+1)*n!).

Table of values

List of values

cp's OEIS Frontend

A087547 a(n) = n!*2^(n+1) * (Integral_{x = 0..1} 1/(1+x^2)^(n+1) dx) - Pi*(2*n)!/(2^(n+1)*n!).

Table of values

List of values

A087547 a(n) = n!2^(n+1) (Integral_{x = 0..1} 1/(1+x^2)^(n+1) dx) - Pi(2n)!/(2^(n+1)*n!).