A370183 - cp's OEIS frontend

A370183 Coefficient of x^n in the expansion of ( (1+x) * (1+x+x^3) )^n.

n	a(n)
0	1
1	2
2	6
3	23
4	98
5	432
6	1929
7	8689
8	39442
9	180248
10	828376
11	3824757
12	17727989
13	82438852
14	384429751
15	1797017598
16	8417950626
17	39506701508
18	185718513144
19	874346516454
20	4121841403488
21	19454625634936
22	91924347974883
23	434783188981384
24	2058320844378109
25	9752580801216182

[1, 2, 6, 23, 98, 432, 1929, 8689, 39442, 180248, 828376, 3824757, 17727989, 82438852, 384429751, 1797017598, 8417950626, 39506701508, 185718513144, 874346516454, 4121841403488, 19454625634936, 91924347974883, 434783188981384, 2058320844378109, 9752580801216182]

cp's OEIS Frontend

A370183 Coefficient of x^n in the expansion of ( (1+x) * (1+x+x^3) )^n.

Table of values

List of values