A192803 - cp's OEIS frontend

A192803 Coefficient of x^2 in the reduction of the polynomial (x+2)^n by x^3->x^2+x+1.

n	a(n)
0	0
1	0
2	1
3	7
4	34
5	144
6	575
7	2239
8	8632
9	33164
10	127297
11	488571
12	1875346
13	7199124
14	27637959
15	106107659
16	407374592
17	1564024808
18	6004739025
19	23053921567
20	88510638482
21	339817775144
22	1304657986015
23	5008956298247
24	19230819824088
25	73832632141076

[0, 0, 1, 7, 34, 144, 575, 2239, 8632, 33164, 127297, 488571, 1875346, 7199124, 27637959, 106107659, 407374592, 1564024808, 6004739025, 23053921567, 88510638482, 339817775144, 1304657986015, 5008956298247, 19230819824088, 73832632141076]

cp's OEIS Frontend

A192803 Coefficient of x^2 in the reduction of the polynomial (x+2)^n by x^3->x^2+x+1.

Table of values

List of values