A222506 - cp's OEIS frontend

A222506 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

n	a(n)
1	4
2	10
3	35
4	423
5	2066
6	23678
7	128889
8	1529195
9	8569032
10	102004630
11	577797690
12	6918500106
13	39468519264
14	474774414486
15	2721664132317
16	32865146885501
17	189103727308651
18	2290577790555642
19	13219410500639451
20	160529083824632284

[4, 10, 35, 423, 2066, 23678, 128889, 1529195, 8569032, 102004630, 577797690, 6918500106, 39468519264, 474774414486, 2721664132317, 32865146885501, 189103727308651, 2290577790555642, 13219410500639451, 160529083824632284]

cp's OEIS Frontend

A222506 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

Table of values

List of values