A213028 - cp's OEIS frontend

A213028 Number A(n,k) of 3n-length k-ary words that can be built by repeatedly inserting triples of identical letters into the initially empty word; square array A(n,k), n>=0, k>=0, read by antidiagonals.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	3
12	8
13	1
14	0
15	1
16	4
17	21
18	38
19	1
20	0
21	1
22	5
23	40
24	183
25	196
26	1
27	0
28	1
29	6
30	65
31	508
32	1773
33	1062
34	1
35	0
36	1
37	7
38	96
39	1085
40	7240
41	18303
42	5948
43	1
44	0
45	1
46	8
47	133
48	1986
49	20425
50	110524
51	197157
52	34120
53	1
54	0
55	1
56	9
57	176
58	3283
59	46476
60	412965
61	1766416
62	2189799
63	199316
64	1
65	0

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 8, 1, 0, 1, 4, 21, 38, 1, 0, 1, 5, 40, 183, 196, 1, 0, 1, 6, 65, 508, 1773, 1062, 1, 0, 1, 7, 96, 1085, 7240, 18303, 5948, 1, 0, 1, 8, 133, 1986, 20425, 110524, 197157, 34120, 1, 0, 1, 9, 176, 3283, 46476, 412965, 1766416, 2189799, 199316, 1, 0]

cp's OEIS Frontend

A213028 Number A(n,k) of 3n-length k-ary words that can be built by repeatedly inserting triples of identical letters into the initially empty word; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

List of values