A084601 - cp's OEIS frontend

A084601 Coefficients of 1/(1-2x-7x^2)^(1/2); also, a(n) is the central coefficient of (1+x+2*x^2)^n.

n	a(n)
0	1
1	1
2	5
3	13
4	49
5	161
6	581
7	2045
8	7393
9	26689
10	97285
11	355565
12	1305745
13	4808545
14	17760965
15	65753693
16	243954113
17	906758785
18	3375949829
19	12587460557
20	46995614449
21	175669746209
22	657370655045
23	2462383495357
24	9232029156001

[1, 1, 5, 13, 49, 161, 581, 2045, 7393, 26689, 97285, 355565, 1305745, 4808545, 17760965, 65753693, 243954113, 906758785, 3375949829, 12587460557, 46995614449, 175669746209, 657370655045, 2462383495357, 9232029156001]

cp's OEIS Frontend

A084601 Coefficients of 1/(1-2x-7x^2)^(1/2); also, a(n) is the central coefficient of (1+x+2*x^2)^n.

Table of values

List of values

cp's OEIS Frontend

A084601 Coefficients of 1/(1-2*x-7*x^2)^(1/2); also, a(n) is the central coefficient of (1+x+2*x^2)^n.

Table of values

List of values

A084601 Coefficients of 1/(1-2x-7x^2)^(1/2); also, a(n) is the central coefficient of (1+x+2*x^2)^n.