A271894 - cp's OEIS frontend

A271894 Expansion of (1+x-3x^2) / ( 1-2x-4x^2+6x^3 ).

n	a(n)
0	1
1	3
2	7
3	20
4	50
5	138
6	356
7	964
8	2524
9	6768
10	17848
11	47624
12	126032
13	335472
14	889328
15	2364352
16	6273184
17	16667808
18	44242240
19	117516608
20	311995328
21	828603648
22	2200088960
23	5842620544
24	15513975040
25	41197898496
26	109395973888
27	290499691520
28	771395887616

[1, 3, 7, 20, 50, 138, 356, 964, 2524, 6768, 17848, 47624, 126032, 335472, 889328, 2364352, 6273184, 16667808, 44242240, 117516608, 311995328, 828603648, 2200088960, 5842620544, 15513975040, 41197898496, 109395973888, 290499691520, 771395887616]

cp's OEIS Frontend

A271894 Expansion of (1+x-3x^2) / ( 1-2x-4x^2+6x^3 ).

Table of values

List of values

cp's OEIS Frontend

A271894 Expansion of (1+x-3*x^2) / ( 1-2*x-4*x^2+6*x^3 ).

Table of values

List of values

A271894 Expansion of (1+x-3x^2) / ( 1-2x-4x^2+6x^3 ).