A098487 - cp's OEIS frontend

A098487 Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square array such that all positions are mutually isolated. Two positions (s,t),(u,v) are considered as isolated from each other if min(abs(s-u),abs(t-v))>1.

n	a(n)
1	1
2	4
3	0
4	9
5	16
6	8
7	16
8	78
9	140
10	79
11	25
12	228
13	964
14	1987
15	1974
16	36
17	520
18	3920
19	16834
20	42368
21	62266
22	49
23	1020
24	11860
25	85275
26	397014
27	1220298
28	2484382
29	64
30	1806
31	29708
32	317471
33	2326320
34	12033330
35	44601420
36	119138166
37	81
38	2968
39	65240
40	962089
41	10087628
42	77784658
43	450193818
44	1979541332
45	6655170642

[1, 4, 0, 9, 16, 8, 16, 78, 140, 79, 25, 228, 964, 1987, 1974, 36, 520, 3920, 16834, 42368, 62266, 49, 1020, 11860, 85275, 397014, 1220298, 2484382, 64, 1806, 29708, 317471, 2326320, 12033330, 44601420, 119138166, 81, 2968, 65240, 962089, 10087628, 77784658, 450193818, 1979541332, 6655170642]

cp's OEIS Frontend

A098487 Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square array such that all positions are mutually isolated. Two positions (s,t),(u,v) are considered as isolated from each other if min(abs(s-u),abs(t-v))>1.

Table of values

List of values