A284877 - cp's OEIS frontend

A284877 Irregular triangle T(n,k) for 1 <= k <= n/2 + 1: T(n,k) = number of double palindrome structures of length n using exactly k different symbols.

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	7
8	2
9	1
10	15
11	5
12	1
13	25
14	21
15	3
16	1
17	49
18	42
19	7
20	1
21	79
22	122
23	44
24	4
25	1
26	129
27	225
28	90
29	9
30	1
31	211
32	570
33	375
34	80
35	5
36	1
37	341
38	990
39	715
40	165
41	11
42	1
43	517
44	2321
45	2487
46	930
47	132
48	6
49	1
50	819
51	3913
52	4550
53	1820
54	273
55	13
56	1
57	1275
58	8827
59	14350
60	8330
61	2009
62	203
63	7

[1, 1, 1, 1, 3, 1, 7, 2, 1, 15, 5, 1, 25, 21, 3, 1, 49, 42, 7, 1, 79, 122, 44, 4, 1, 129, 225, 90, 9, 1, 211, 570, 375, 80, 5, 1, 341, 990, 715, 165, 11, 1, 517, 2321, 2487, 930, 132, 6, 1, 819, 3913, 4550, 1820, 273, 13, 1, 1275, 8827, 14350, 8330, 2009, 203, 7]

cp's OEIS Frontend

A284877 Irregular triangle T(n,k) for 1 <= k <= n/2 + 1: T(n,k) = number of double palindrome structures of length n using exactly k different symbols.

Table of values

List of values