A166883 - cp's OEIS frontend

A166883 a(n) = coefficient of x^n in the (n+1)-th iteration of (x + x^2 + x^3) for n>=1.

n	a(n)
1	1
2	3
3	16
4	120
5	1200
6	15078
7	228984
8	4085028
9	83795085
10	1943920935
11	50333780640
12	1439208976920
13	45044270036220
14	1531759925038616
15	56239576979827360
16	2217379518189430404
17	93441321290076019236
18	4191262657895865499821

[1, 3, 16, 120, 1200, 15078, 228984, 4085028, 83795085, 1943920935, 50333780640, 1439208976920, 45044270036220, 1531759925038616, 56239576979827360, 2217379518189430404, 93441321290076019236, 4191262657895865499821]

cp's OEIS Frontend

A166883 a(n) = coefficient of x^n in the (n+1)-th iteration of (x + x^2 + x^3) for n>=1.

Table of values

List of values