A250737 - cp's OEIS frontend

A250737 Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.

n	a(n)
1	18
2	22
3	30
4	46
5	78
6	142
7	270
8	526
9	1038
10	2062
11	4110
12	8206
13	16398
14	32782
15	65550
16	131086
17	262158
18	524302
19	1048590
20	2097166
21	4194318
22	8388622
23	16777230
24	33554446
25	67108878
26	134217742
27	268435470
28	536870926
29	1073741838
30	2147483662
31	4294967310

[18, 22, 30, 46, 78, 142, 270, 526, 1038, 2062, 4110, 8206, 16398, 32782, 65550, 131086, 262158, 524302, 1048590, 2097166, 4194318, 8388622, 16777230, 33554446, 67108878, 134217742, 268435470, 536870926, 1073741838, 2147483662, 4294967310]

cp's OEIS Frontend

A250737 Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.

Table of values

List of values