A087432 - cp's OEIS frontend

A087432 Expansion of 1+x(1-x-4x^2)/((1+x)(1-2x)(1-3x)).

n	a(n)
0	1
1	1
2	3
3	7
4	19
5	51
6	143
7	407
8	1179
9	3451
10	10183
11	30207
12	89939
13	268451
14	802623
15	2402407
16	7196299
17	21567051
18	64657463
19	193885007
20	581480259
21	1744091251
22	5231574703
23	15693326007
24	47077181819
25	141225953051
26	423666674343

[1, 1, 3, 7, 19, 51, 143, 407, 1179, 3451, 10183, 30207, 89939, 268451, 802623, 2402407, 7196299, 21567051, 64657463, 193885007, 581480259, 1744091251, 5231574703, 15693326007, 47077181819, 141225953051, 423666674343]

cp's OEIS Frontend

A087432 Expansion of 1+x(1-x-4x^2)/((1+x)(1-2x)(1-3x)).

Table of values

List of values

cp's OEIS Frontend

A087432 Expansion of 1+x*(1-x-4*x^2)/((1+x)*(1-2*x)*(1-3*x)).

Table of values

List of values

A087432 Expansion of 1+x(1-x-4x^2)/((1+x)(1-2x)(1-3x)).