A123531 - cp's OEIS frontend

A123531 Triangle read by rows: CP(n,i) for n>=0 and 3n+1 >= i >= 0, gives the absolute value of the coefficients of the chromatic polynomial of C_3 X P_(n+1) factored in the form x(x-1)^i.

n	a(n)
0	1
1	1
2	1
3	4
4	8
5	9
6	4
7	1
8	7
9	25
10	57
11	87
12	89
13	56
14	16
15	1
16	10
17	51
18	171
19	411
20	735
21	986
22	977
23	684
24	304
25	64
26	1
27	13
28	86
29	378
30	1219
31	3027
32	5930
33	9254
34	11485
35	11185
36	8304
37	4448
38	1536
39	256
40	1
41	16
42	130
43	705
44	2835
45	8918
46	22618
47	47055
48	81005
49	115630
50	136300
51	131225
52	101140

[1, 1, 1, 4, 8, 9, 4, 1, 7, 25, 57, 87, 89, 56, 16, 1, 10, 51, 171, 411, 735, 986, 977, 684, 304, 64, 1, 13, 86, 378, 1219, 3027, 5930, 9254, 11485, 11185, 8304, 4448, 1536, 256, 1, 16, 130, 705, 2835, 8918, 22618, 47055, 81005, 115630, 136300, 131225, 101140]

cp's OEIS Frontend

A123531 Triangle read by rows: CP(n,i) for n>=0 and 3n+1 >= i >= 0, gives the absolute value of the coefficients of the chromatic polynomial of C_3 X P_(n+1) factored in the form x(x-1)^i.

Table of values

List of values