A219680 - cp's OEIS frontend

A219680 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 2 array.

n	a(n)
1	3
2	4
3	9
4	19
5	35
6	60
7	98
8	154
9	234
10	345
11	495
12	693
13	949
14	1274
15	1680
16	2180
17	2788
18	3519
19	4389
20	5415
21	6615
22	8008
23	9614
24	11454
25	13550
26	15925
27	18603
28	21609
29	24969
30	28710
31	32860
32	37448
33	42504
34	48059
35	54145
36	60795
37	68043
38	75924
39	84474
40	93730
41	103730
42	114513

[3, 4, 9, 19, 35, 60, 98, 154, 234, 345, 495, 693, 949, 1274, 1680, 2180, 2788, 3519, 4389, 5415, 6615, 8008, 9614, 11454, 13550, 15925, 18603, 21609, 24969, 28710, 32860, 37448, 42504, 48059, 54145, 60795, 68043, 75924, 84474, 93730, 103730, 114513]

cp's OEIS Frontend

A219680 Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 2 array.

Table of values

List of values