A123020 - cp's OEIS frontend

A123020 Expansion of (1 -5x +5x^2)/((1 -2x)(1 -4*x +x^2)).

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	43
6	142
7	493
8	1766
9	6443
10	23750
11	88045
12	327406
13	1219531
14	4546622
15	16958765
16	63272054
17	236096683
18	881049142
19	3287968813
20	12270563966
21	45793762763
22	170903438510
23	637817894125
24	2380363943686
25	8883629492011

[1, 1, 2, 5, 14, 43, 142, 493, 1766, 6443, 23750, 88045, 327406, 1219531, 4546622, 16958765, 63272054, 236096683, 881049142, 3287968813, 12270563966, 45793762763, 170903438510, 637817894125, 2380363943686, 8883629492011]

cp's OEIS Frontend

A123020 Expansion of (1 -5x +5x^2)/((1 -2x)(1 -4*x +x^2)).

Table of values

List of values

cp's OEIS Frontend

A123020 Expansion of (1 -5*x +5*x^2)/((1 -2*x)*(1 -4*x +x^2)).

Table of values

List of values

A123020 Expansion of (1 -5x +5x^2)/((1 -2x)(1 -4*x +x^2)).