A104508 - cp's OEIS frontend

A104508 Absolute row sums of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1+x-x^2)^n.

n	a(n)
0	1
1	2
2	4
3	9
4	20
5	47
6	103
7	198
8	512
9	1161
10	1985
11	5590
12	13005
13	21684
14	59294
15	142273
16	270858
17	634187
18	1526399
19	3256372
20	6779657
21	16020364
22	37758202
23	79702477
24	164647757
25	424655100
26	940639154
27	1709638551
28	4675803604
29	10774789429

[1, 2, 4, 9, 20, 47, 103, 198, 512, 1161, 1985, 5590, 13005, 21684, 59294, 142273, 270858, 634187, 1526399, 3256372, 6779657, 16020364, 37758202, 79702477, 164647757, 424655100, 940639154, 1709638551, 4675803604, 10774789429]

cp's OEIS Frontend

A104508 Absolute row sums of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1+x-x^2)^n.

Table of values

List of values