A164754 - cp's OEIS frontend

A164754 Number of n X 2 1..4 arrays with all 1's connected, all 2's connected, all 3's connected, all 4's connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 2 neighbors with the same value.

n	a(n)
2	1
3	8
4	25
5	50
6	83
7	124
8	173
9	230
10	295
11	368
12	449
13	538
14	635
15	740
16	853
17	974
18	1103
19	1240
20	1385
21	1538
22	1699
23	1868
24	2045
25	2230
26	2423
27	2624
28	2833
29	3050
30	3275
31	3508
32	3749
33	3998
34	4255
35	4520
36	4793
37	5074
38	5363
39	5660
40	5965
41	6278
42	6599
43	6928
44	7265
45	7610
46	7963
47	8324
48	8693

[1, 8, 25, 50, 83, 124, 173, 230, 295, 368, 449, 538, 635, 740, 853, 974, 1103, 1240, 1385, 1538, 1699, 1868, 2045, 2230, 2423, 2624, 2833, 3050, 3275, 3508, 3749, 3998, 4255, 4520, 4793, 5074, 5363, 5660, 5965, 6278, 6599, 6928, 7265, 7610, 7963, 8324, 8693]

cp's OEIS Frontend

A164754 Number of n X 2 1..4 arrays with all 1's connected, all 2's connected, all 3's connected, all 4's connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 2 neighbors with the same value.

Table of values

List of values