A190733 - cp's OEIS frontend

A190733 Expansion of (4x+2)/(1+sqrt(1-4x-4*x^2)).

n	a(n)
0	1
1	3
2	5
3	15
4	49
5	175
6	657
7	2559
8	10241
9	41855
10	173953
11	732927
12	3123457
13	13439743
14	58307841
15	254779391
16	1120247809
17	4952864767
18	22005184513
19	98196398079
20	439923990529
21	1977917169663
22	8921667641345
23	40361657696255
24	183092192411649
25	832634240106495
26	3795237359190017

[1, 3, 5, 15, 49, 175, 657, 2559, 10241, 41855, 173953, 732927, 3123457, 13439743, 58307841, 254779391, 1120247809, 4952864767, 22005184513, 98196398079, 439923990529, 1977917169663, 8921667641345, 40361657696255, 183092192411649, 832634240106495, 3795237359190017]

cp's OEIS Frontend

A190733 Expansion of (4x+2)/(1+sqrt(1-4x-4*x^2)).

Table of values

List of values

cp's OEIS Frontend

A190733 Expansion of (4*x+2)/(1+sqrt(1-4*x-4*x^2)).

Table of values

List of values

A190733 Expansion of (4x+2)/(1+sqrt(1-4x-4*x^2)).