A271786 - cp's OEIS frontend

A271786 Expansion of 2(1-x)(2x^2+4x+1) / (1-x-x^2)^2.

n	a(n)
0	2
1	10
2	18
3	38
4	72
5	136
6	250
7	454
8	814
9	1446
10	2548
11	4460
12	7762
13	13442
14	23178
15	39814
16	68160
17	116336
18	198026
19	336254
20	569702
21	963270
22	1625708
23	2739028
24	4607522
25	7739386
26	12982530
27	21750374
28	36396984
29	60839896
30	101593498
31	169482550
32	282481822
33	470419302

[2, 10, 18, 38, 72, 136, 250, 454, 814, 1446, 2548, 4460, 7762, 13442, 23178, 39814, 68160, 116336, 198026, 336254, 569702, 963270, 1625708, 2739028, 4607522, 7739386, 12982530, 21750374, 36396984, 60839896, 101593498, 169482550, 282481822, 470419302]

cp's OEIS Frontend

A271786 Expansion of 2(1-x)(2x^2+4x+1) / (1-x-x^2)^2.

Table of values

List of values

cp's OEIS Frontend

A271786 Expansion of 2*(1-x)*(2*x^2+4*x+1) / (1-x-x^2)^2.

Table of values

List of values

A271786 Expansion of 2(1-x)(2x^2+4x+1) / (1-x-x^2)^2.