A281201 - cp's OEIS frontend

A281201 Number of n X 4 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	2
2	28
3	98
4	270
5	676
6	1588
7	3604
8	7960
9	17254
10	36848
11	77776
12	162610
13	337292
14	694982
15	1423852
16	2902806
17	5892558
18	11916410
19	24017514
20	48262212
21	96719706
22	193358890
23	385702166
24	767826768
25	1525708160
26	3026506470
27	5994196442
28	11854696726

[2, 28, 98, 270, 676, 1588, 3604, 7960, 17254, 36848, 77776, 162610, 337292, 694982, 1423852, 2902806, 5892558, 11916410, 24017514, 48262212, 96719706, 193358890, 385702166, 767826768, 1525708160, 3026506470, 5994196442, 11854696726]

cp's OEIS Frontend

A281201 Number of n X 4 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values