A357786 - cp's OEIS frontend

A357786 a(n) = coefficient of x^n, n >= 1, in A(x) such that: A(x)^2 = A( x^2/(1 - 4x - 8x^2) ) * sqrt(1 - 4x - 8x^2).

n	a(n)
1	1
2	1
3	5
4	20
5	98
6	483
7	2499
8	13182
9	71030
10	388484
11	2152982
12	12061840
13	68212585
14	388886050
15	2232764700
16	12898728750
17	74923372563
18	437303591874
19	2563373794884
20	15083551143318
21	89060360731377
22	527477003037984
23	3132774700791126
24	18652891302520806
25	111314950683514698

[1, 1, 5, 20, 98, 483, 2499, 13182, 71030, 388484, 2152982, 12061840, 68212585, 388886050, 2232764700, 12898728750, 74923372563, 437303591874, 2563373794884, 15083551143318, 89060360731377, 527477003037984, 3132774700791126, 18652891302520806, 111314950683514698]

cp's OEIS Frontend

A357786 a(n) = coefficient of x^n, n >= 1, in A(x) such that: A(x)^2 = A( x^2/(1 - 4x - 8x^2) ) * sqrt(1 - 4x - 8x^2).

Table of values

List of values

cp's OEIS Frontend

A357786 a(n) = coefficient of x^n, n >= 1, in A(x) such that: A(x)^2 = A( x^2/(1 - 4*x - 8*x^2) ) * sqrt(1 - 4*x - 8*x^2).

Table of values

List of values

A357786 a(n) = coefficient of x^n, n >= 1, in A(x) such that: A(x)^2 = A( x^2/(1 - 4x - 8x^2) ) * sqrt(1 - 4x - 8x^2).