A385407 - cp's OEIS frontend

A385407 Number of strings of length n defined on {0, 1, 2, 3} that contain one or no 1's, two or no 2's, three or no 3's and any number of 0's.

n	a(n)
0	1
1	2
2	4
3	11
4	31
5	86
6	282
7	939
8	2781
9	7186
10	16496
11	34387
12	66299
13	119926
14	205766
15	337731
16	533817
17	816834
18	1215196
19	1763771
20	2504791
21	3488822
22	4775794
23	6436091
24	8551701
25	11217426
26	14542152
27	18650179
28	23682611
29	29798806
30	37177886
31	46020307
32	56549489
33	69013506
34	83686836
35	100872171

[1, 2, 4, 11, 31, 86, 282, 939, 2781, 7186, 16496, 34387, 66299, 119926, 205766, 337731, 533817, 816834, 1215196, 1763771, 2504791, 3488822, 4775794, 6436091, 8551701, 11217426, 14542152, 18650179, 23682611, 29798806, 37177886, 46020307, 56549489, 69013506, 83686836, 100872171]

cp's OEIS Frontend

A385407 Number of strings of length n defined on {0, 1, 2, 3} that contain one or no 1's, two or no 2's, three or no 3's and any number of 0's.

Table of values

List of values