A219465 - cp's OEIS frontend

A219465 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 2 array.

n	a(n)
1	4
2	23
3	82
4	239
5	619
6	1471
7	3259
8	6800
9	13464
10	25453
11	46178
12	80755
13	136643
14	224449
15	358927
16	560200
17	855236
18	1279611
19	1879594
20	2714591
21	3859987
22	5410427
23	7483579
24	10224424
25	13810120
26	18455489
27	24419178
28	32010547
29	41597339
30	53614189
31	68572031

[4, 23, 82, 239, 619, 1471, 3259, 6800, 13464, 25453, 46178, 80755, 136643, 224449, 358927, 560200, 855236, 1279611, 1879594, 2714591, 3859987, 5410427, 7483579, 10224424, 13810120, 18455489, 24419178, 32010547, 41597339, 53614189, 68572031]

cp's OEIS Frontend

A219465 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 2 array.

Table of values

List of values