A183135 - cp's OEIS frontend

A183135 Square array A(n,k) by antidiagonals. A(n,k) is the number of length 2n k-ary words (n,k>=0) that can be built by repeatedly inserting doublets into the initially empty word.

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	6
13	1
14	0
15	1
16	4
17	15
18	20
19	1
20	0
21	1
22	5
23	28
24	87
25	70
26	1
27	0
28	1
29	6
30	45
31	232
32	543
33	252
34	1
35	0
36	1
37	7
38	66
39	485
40	2092
41	3543
42	924
43	1
44	0
45	1
46	8
47	91
48	876
49	5725
50	19864
51	23823
52	3432
53	1
54	0
55	1
56	9
57	120
58	1435
59	12786
60	71445
61	195352
62	163719
63	12870
64	1
65	0

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 6, 1, 0, 1, 4, 15, 20, 1, 0, 1, 5, 28, 87, 70, 1, 0, 1, 6, 45, 232, 543, 252, 1, 0, 1, 7, 66, 485, 2092, 3543, 924, 1, 0, 1, 8, 91, 876, 5725, 19864, 23823, 3432, 1, 0, 1, 9, 120, 1435, 12786, 71445, 195352, 163719, 12870, 1, 0]

cp's OEIS Frontend

A183135 Square array A(n,k) by antidiagonals. A(n,k) is the number of length 2n k-ary words (n,k>=0) that can be built by repeatedly inserting doublets into the initially empty word.

Table of values

List of values