A386489 - cp's OEIS frontend

A386489 Expansion of (1-x)/((1+x+2x^2)(1-4*x+x^2)).

n	a(n)
0	1
1	2
2	7
3	30
4	109
5	402
6	1511
7	5638
8	21021
9	78474
10	292887
11	1093006
12	4079181
13	15223810
14	56815879
15	212039702
16	791343293
17	2953333114
18	11021988791
19	41134623134
20	153516503405
21	572931388658
22	2138209053735
23	7979904827430
24	29781410249821
25	111145736175722

[1, 2, 7, 30, 109, 402, 1511, 5638, 21021, 78474, 292887, 1093006, 4079181, 15223810, 56815879, 212039702, 791343293, 2953333114, 11021988791, 41134623134, 153516503405, 572931388658, 2138209053735, 7979904827430, 29781410249821, 111145736175722]

cp's OEIS Frontend

A386489 Expansion of (1-x)/((1+x+2x^2)(1-4*x+x^2)).

Table of values

List of values

cp's OEIS Frontend

A386489 Expansion of (1-x)/((1+x+2*x^2)*(1-4*x+x^2)).

Table of values

List of values

A386489 Expansion of (1-x)/((1+x+2x^2)(1-4*x+x^2)).