A212691 - cp's OEIS frontend

A212691 Number of (w,x,y,z) with all terms in {1,...,n} and w+|x-y|<=|x-z|+|y-z|.

n	a(n)
0	0
1	0
2	2
3	8
4	26
5	50
6	100
7	154
8	252
9	348
10	510
11	660
12	902
13	1118
14	1456
15	1750
16	2200
17	2584
18	3162
19	3648
20	4370
21	4970
22	5852
23	6578
24	7636
25	8500
26	9750
27	10764
28	12222
29	13398
30	15080
31	16430
32	18352
33	19888
34	22066
35	23800
36	26250
37	28194
38	30932
39	33098
40	36140

[0, 0, 2, 8, 26, 50, 100, 154, 252, 348, 510, 660, 902, 1118, 1456, 1750, 2200, 2584, 3162, 3648, 4370, 4970, 5852, 6578, 7636, 8500, 9750, 10764, 12222, 13398, 15080, 16430, 18352, 19888, 22066, 23800, 26250, 28194, 30932, 33098, 36140]

cp's OEIS Frontend

A212691 Number of (w,x,y,z) with all terms in {1,...,n} and w+|x-y|<=|x-z|+|y-z|.

Table of values

List of values