A103971 - cp's OEIS frontend

A103971 Expansion of (1 - sqrt(1 - 4x - 16x^2))/(2*x).

n	a(n)
0	1
1	5
2	10
3	45
4	190
5	930
6	4660
7	24445
8	131190
9	719830
10	4013260
11	22684370
12	129661740
13	748252580
14	4353379560
15	25508284445
16	150392391590
17	891549228430
18	5310994644060
19	31775749689670
20	190860711108740
21	1150473009844380

[1, 5, 10, 45, 190, 930, 4660, 24445, 131190, 719830, 4013260, 22684370, 129661740, 748252580, 4353379560, 25508284445, 150392391590, 891549228430, 5310994644060, 31775749689670, 190860711108740, 1150473009844380]

cp's OEIS Frontend

A103971 Expansion of (1 - sqrt(1 - 4x - 16x^2))/(2*x).

Table of values

List of values

cp's OEIS Frontend

A103971 Expansion of (1 - sqrt(1 - 4*x - 16*x^2))/(2*x).

Table of values

List of values

A103971 Expansion of (1 - sqrt(1 - 4x - 16x^2))/(2*x).