A212684 - cp's OEIS frontend

A212684 Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=n-w+|y-z|.

n	a(n)
0	0
1	1
2	6
3	19
4	42
5	79
6	132
7	205
8	300
9	421
10	570
11	751
12	966
13	1219
14	1512
15	1849
16	2232
17	2665
18	3150
19	3691
20	4290
21	4951
22	5676
23	6469
24	7332
25	8269
26	9282
27	10375
28	11550
29	12811
30	14160
31	15601
32	17136
33	18769
34	20502
35	22339
36	24282
37	26335
38	28500
39	30781
40	33180

[0, 1, 6, 19, 42, 79, 132, 205, 300, 421, 570, 751, 966, 1219, 1512, 1849, 2232, 2665, 3150, 3691, 4290, 4951, 5676, 6469, 7332, 8269, 9282, 10375, 11550, 12811, 14160, 15601, 17136, 18769, 20502, 22339, 24282, 26335, 28500, 30781, 33180]

cp's OEIS Frontend

A212684 Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=n-w+|y-z|.

Table of values

List of values