A279980 - cp's OEIS frontend

A279980 Number of 4Xn 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	0
2	31
3	296
4	1922
5	10491
6	50690
7	226771
8	963728
9	3941732
10	15655280
11	60749739
12	231325874
13	867192006
14	3208394065
15	11737643962
16	42526452550
17	152777627539
18	544782076812
19	1929805835927
20	6795769111934
21	23804414728200
22	82983605105905

[0, 31, 296, 1922, 10491, 50690, 226771, 963728, 3941732, 15655280, 60749739, 231325874, 867192006, 3208394065, 11737643962, 42526452550, 152777627539, 544782076812, 1929805835927, 6795769111934, 23804414728200, 82983605105905]

cp's OEIS Frontend

A279980 Number of 4Xn 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values