A250770 - cp's OEIS frontend

A250770 Number of (2+1) X (n+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	18
2	34
3	62
4	114
5	214
6	410
7	798
8	1570
9	3110
10	6186
11	12334
12	24626
13	49206
14	98362
15	196670
16	393282
17	786502
18	1572938
19	3145806
20	6291538
21	12582998
22	25165914
23	50331742
24	100663394
25	201326694
26	402653290
27	805306478
28	1610612850
29	3221225590

[18, 34, 62, 114, 214, 410, 798, 1570, 3110, 6186, 12334, 24626, 49206, 98362, 196670, 393282, 786502, 1572938, 3145806, 6291538, 12582998, 25165914, 50331742, 100663394, 201326694, 402653290, 805306478, 1610612850, 3221225590]

cp's OEIS Frontend

A250770 Number of (2+1) X (n+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