A250678 - cp's OEIS frontend

A250678 Number of (2+1)X(n+1) 0..3 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	520
2	5154
3	42422
4	329226
5	2406972
6	16949262
7	115965426
8	777137322
9	5127532140
10	33440743748
11	216192271674
12	1388450185042
13	8872367832376
14	56479411574776
15	358489567889570
16	2270374738759036
17	14354245060678584
18	90635411405776404

[520, 5154, 42422, 329226, 2406972, 16949262, 115965426, 777137322, 5127532140, 33440743748, 216192271674, 1388450185042, 8872367832376, 56479411574776, 358489567889570, 2270374738759036, 14354245060678584, 90635411405776404]

cp's OEIS Frontend

A250678 Number of (2+1)X(n+1) 0..3 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