A250778 - cp's OEIS frontend

A250778 Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

n	a(n)
1	46
2	106
3	230
4	482
5	990
6	2010
7	4054
8	8146
9	16334
10	32714
11	65478
12	131010
13	262078
14	524218
15	1048502
16	2097074
17	4194222
18	8388522
19	16777126
20	33554338
21	67108766
22	134217626
23	268435350
24	536870802
25	1073741710
26	2147483530
27	4294967174

[46, 106, 230, 482, 990, 2010, 4054, 8146, 16334, 32714, 65478, 131010, 262078, 524218, 1048502, 2097074, 4194222, 8388522, 16777126, 33554338, 67108766, 134217626, 268435350, 536870802, 1073741710, 2147483530, 4294967174]

cp's OEIS Frontend

A250778 Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

List of values