A381349 - cp's OEIS frontend

A381349 Triangle read by rows: T(n,k) is the number of distinct tuples E each corresponding to some k-ary word W = (w_1, ..., w_n), where E is a tuple (e_1, ..., e_{n-1}) with e_i being the number of pairs of equal letters (w_j,w_k) in W such that j + i = k.

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	4
7	1
8	6
9	9
10	10
11	1
12	10
13	22
14	26
15	27
16	1
17	20
18	54
19	73
20	78
21	79
22	1
23	36
24	163
25	249
26	269
27	275
28	276
29	1
30	72
31	447
32	791
33	915
34	942
35	949
36	950
37	1
38	135
39	1350
40	3136
41	3776
42	3899
43	3934
44	3942
45	3943
46	1
47	272
48	4088
49	11315
50	14849
51	15650
52	15811
53	15855
54	15864
55	15865

[1, 1, 2, 1, 3, 4, 1, 6, 9, 10, 1, 10, 22, 26, 27, 1, 20, 54, 73, 78, 79, 1, 36, 163, 249, 269, 275, 276, 1, 72, 447, 791, 915, 942, 949, 950, 1, 135, 1350, 3136, 3776, 3899, 3934, 3942, 3943, 1, 272, 4088, 11315, 14849, 15650, 15811, 15855, 15864, 15865]

cp's OEIS Frontend

A381349 Triangle read by rows: T(n,k) is the number of distinct tuples E each corresponding to some k-ary word W = (w_1, ..., w_n), where E is a tuple (e_1, ..., e_{n-1}) with e_i being the number of pairs of equal letters (w_j,w_k) in W such that j + i = k.

Table of values

List of values