A208633 - cp's OEIS frontend

A208633 Number of n X 4 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

n	a(n)
1	8
2	23
3	71
4	225
5	722
6	2331
7	7548
8	24476
9	79423
10	257807
11	836973
12	2717446
13	8823199
14	28648292
15	93019712
16	302032007
17	980690055
18	3184277945
19	10339281402
20	33571429395
21	109005736508
22	353939387572
23	1149233948207
24	3731539152111

[8, 23, 71, 225, 722, 2331, 7548, 24476, 79423, 257807, 836973, 2717446, 8823199, 28648292, 93019712, 302032007, 980690055, 3184277945, 10339281402, 33571429395, 109005736508, 353939387572, 1149233948207, 3731539152111]

cp's OEIS Frontend

A208633 Number of n X 4 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

List of values