A114688 - cp's OEIS frontend

A114688 Expansion of (1 +3x -x^2)/((1-x^2)(1-2*x-x^2)); a Pellian-related sequence.

n	a(n)
0	1
1	5
2	11
3	30
4	71
5	175
6	421
7	1020
8	2461
9	5945
10	14351
11	34650
12	83651
13	201955
14	487561
15	1177080
16	2841721
17	6860525
18	16562771
19	39986070
20	96534911
21	233055895
22	562646701
23	1358349300
24	3279345301
25	7917039905
26	19113425111
27	46143890130
28	111401205371
29	268946300875

[1, 5, 11, 30, 71, 175, 421, 1020, 2461, 5945, 14351, 34650, 83651, 201955, 487561, 1177080, 2841721, 6860525, 16562771, 39986070, 96534911, 233055895, 562646701, 1358349300, 3279345301, 7917039905, 19113425111, 46143890130, 111401205371, 268946300875]

cp's OEIS Frontend

A114688 Expansion of (1 +3x -x^2)/((1-x^2)(1-2*x-x^2)); a Pellian-related sequence.

Table of values

List of values

cp's OEIS Frontend

A114688 Expansion of (1 +3*x -x^2)/((1-x^2)*(1-2*x-x^2)); a Pellian-related sequence.

Table of values

List of values

A114688 Expansion of (1 +3x -x^2)/((1-x^2)(1-2*x-x^2)); a Pellian-related sequence.