A212039 - cp's OEIS frontend

A212039 Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element within a city block distance of two, and containing the value n(n+1)/2-2.

n	a(n)
1	0
2	1
3	4
4	19
5	58
6	136
7	271
8	484
9	799
10	1243
11	1846
12	2641
13	3664
14	4954
15	6553
16	8506
17	10861
18	13669
19	16984
20	20863
21	25366
22	30556
23	36499
24	43264
25	50923
26	59551
27	69226
28	80029
29	92044
30	105358
31	120061
32	136246
33	154009
34	173449
35	194668
36	217771
37	242866
38	270064
39	299479

[0, 1, 4, 19, 58, 136, 271, 484, 799, 1243, 1846, 2641, 3664, 4954, 6553, 8506, 10861, 13669, 16984, 20863, 25366, 30556, 36499, 43264, 50923, 59551, 69226, 80029, 92044, 105358, 120061, 136246, 154009, 173449, 194668, 217771, 242866, 270064, 299479]

cp's OEIS Frontend

A212039 Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element within a city block distance of two, and containing the value n(n+1)/2-2.

Table of values

List of values