A098470 - cp's OEIS frontend

A098470 Form array in which n-th row is obtained by expanding (1+x+x^2)^n and taking the 5th column from the center.

n	a(n)
5	1
6	6
7	28
8	112
9	414
10	1452
11	4917
12	16236
13	52624
14	168168
15	531531
16	1665456
17	5182008
18	16031952
19	49366674
20	151419816
21	462919401
22	1411306358
23	4292487562
24	13029127584
25	39478598170
26	119439969220
27	360881425710
28	1089126806040

[1, 6, 28, 112, 414, 1452, 4917, 16236, 52624, 168168, 531531, 1665456, 5182008, 16031952, 49366674, 151419816, 462919401, 1411306358, 4292487562, 13029127584, 39478598170, 119439969220, 360881425710, 1089126806040]

cp's OEIS Frontend

A098470 Form array in which n-th row is obtained by expanding (1+x+x^2)^n and taking the 5th column from the center.

Table of values

List of values