A212677 - cp's OEIS frontend

A212677 Number of (w,x,y,z) with all terms in {1,...,n} and w+y=|x-y|+|y-z|.

n	a(n)
0	0
1	0
2	1
3	7
4	21
5	46
6	86
7	144
8	223
9	327
10	459
11	622
12	820
13	1056
14	1333
15	1655
16	2025
17	2446
18	2922
19	3456
20	4051
21	4711
22	5439
23	6238
24	7112
25	8064
26	9097
27	10215
28	11421
29	12718
30	14110
31	15600
32	17191
33	18887
34	20691
35	22606
36	24636
37	26784
38	29053
39	31447
40	33969

[0, 0, 1, 7, 21, 46, 86, 144, 223, 327, 459, 622, 820, 1056, 1333, 1655, 2025, 2446, 2922, 3456, 4051, 4711, 5439, 6238, 7112, 8064, 9097, 10215, 11421, 12718, 14110, 15600, 17191, 18887, 20691, 22606, 24636, 26784, 29053, 31447, 33969]

cp's OEIS Frontend

A212677 Number of (w,x,y,z) with all terms in {1,...,n} and w+y=|x-y|+|y-z|.

Table of values

List of values