A194999 - cp's OEIS frontend

A194999 Number of lower triangles of a 3 X 3 0..n array with each element differing from all of its horizontal and vertical neighbors by one.

n	a(n)
1	2
2	20
3	42
4	66
5	90
6	114
7	138
8	162
9	186
10	210
11	234
12	258
13	282
14	306
15	330
16	354
17	378
18	402
19	426
20	450
21	474
22	498
23	522
24	546
25	570
26	594
27	618
28	642
29	666
30	690
31	714
32	738
33	762
34	786
35	810
36	834
37	858
38	882
39	906
40	930
41	954
42	978
43	1002
44	1026
45	1050
46	1074
47	1098
48	1122
49	1146
50	1170
51	1194
52	1218

[2, 20, 42, 66, 90, 114, 138, 162, 186, 210, 234, 258, 282, 306, 330, 354, 378, 402, 426, 450, 474, 498, 522, 546, 570, 594, 618, 642, 666, 690, 714, 738, 762, 786, 810, 834, 858, 882, 906, 930, 954, 978, 1002, 1026, 1050, 1074, 1098, 1122, 1146, 1170, 1194, 1218]

cp's OEIS Frontend

A194999 Number of lower triangles of a 3 X 3 0..n array with each element differing from all of its horizontal and vertical neighbors by one.

Table of values

List of values