A331320 - cp's OEIS frontend

A331320 a(n) = [x^n] ((x + 1)(2x - 1)(2x^2 - 1))/(2x^2 + 2x - 1)^2.

n	a(n)
0	1
1	3
2	8
3	26
4	80
5	244
6	736
7	2200
8	6528
9	19248
10	56448
11	164768
12	478976
13	1387328
14	4005376
15	11530624
16	33107968
17	94839552
18	271091712
19	773380608
20	2202374144
21	6261404672
22	17774206976
23	50384312320
24	142636515328
25	403306786816
26	1139055820800
27	3213593911296
28	9057375289344

[1, 3, 8, 26, 80, 244, 736, 2200, 6528, 19248, 56448, 164768, 478976, 1387328, 4005376, 11530624, 33107968, 94839552, 271091712, 773380608, 2202374144, 6261404672, 17774206976, 50384312320, 142636515328, 403306786816, 1139055820800, 3213593911296, 9057375289344]

cp's OEIS Frontend

A331320 a(n) = [x^n] ((x + 1)(2x - 1)(2x^2 - 1))/(2x^2 + 2x - 1)^2.

Table of values

List of values

cp's OEIS Frontend

A331320 a(n) = [x^n] ((x + 1)*(2*x - 1)*(2*x^2 - 1))/(2*x^2 + 2*x - 1)^2.

Table of values

List of values

A331320 a(n) = [x^n] ((x + 1)(2x - 1)(2x^2 - 1))/(2x^2 + 2x - 1)^2.