A303568 - cp's OEIS frontend

A303568 a(n) = [x^n] ((Sum_{k=0..n} (k+3)!x^k)/(Sum_{k=0..n} (k+3)!(-x)^k))^(1/4).

n	a(n)
0	1
1	2
2	2
3	32
4	62
5	1764
6	3916
7	173376
8	393446
9	25166076
10	56406348
11	4958003840
12	10882283500
13	1264942740680
14	2721161685880
15	405344510959872
16	857860989902854
17	159511701001085164
18	333452808033317004
19	75711389658286217024
20	156849644184430434436

[1, 2, 2, 32, 62, 1764, 3916, 173376, 393446, 25166076, 56406348, 4958003840, 10882283500, 1264942740680, 2721161685880, 405344510959872, 857860989902854, 159511701001085164, 333452808033317004, 75711389658286217024, 156849644184430434436]

cp's OEIS Frontend

A303568 a(n) = [x^n] ((Sum_{k=0..n} (k+3)!x^k)/(Sum_{k=0..n} (k+3)!(-x)^k))^(1/4).

Table of values

List of values

cp's OEIS Frontend

A303568 a(n) = [x^n] ((Sum_{k=0..n} (k+3)!*x^k)/(Sum_{k=0..n} (k+3)!*(-x)^k))^(1/4).

Table of values

List of values

A303568 a(n) = [x^n] ((Sum_{k=0..n} (k+3)!x^k)/(Sum_{k=0..n} (k+3)!(-x)^k))^(1/4).