A212565 - cp's OEIS frontend

A212565 Number of (w,x,y,z) with all terms in {1,...,n} and w+x>=2y+2z.

n	a(n)
0	0
1	0
2	1
3	8
4	28
5	74
6	159
7	304
8	528
9	860
10	1325
11	1960
12	2796
13	3878
14	5243
15	6944
16	9024
17	11544
18	14553
19	18120
20	22300
21	27170
22	32791
23	39248
24	46608
25	54964
26	64389
27	74984
28	86828
29	100030
30	114675
31	130880
32	148736
33	168368
34	189873
35	213384
36	239004
37	266874
38	297103
39	329840

[0, 0, 1, 8, 28, 74, 159, 304, 528, 860, 1325, 1960, 2796, 3878, 5243, 6944, 9024, 11544, 14553, 18120, 22300, 27170, 32791, 39248, 46608, 54964, 64389, 74984, 86828, 100030, 114675, 130880, 148736, 168368, 189873, 213384, 239004, 266874, 297103, 329840]

cp's OEIS Frontend

A212565 Number of (w,x,y,z) with all terms in {1,...,n} and w+x>=2y+2z.

Table of values

List of values