A212068 - cp's OEIS frontend

A212068 Number of (w,x,y,z) with all terms in {1,...,n} and 2w=x+y+z.

n	a(n)
0	0
1	0
2	3
3	10
4	25
5	49
6	86
7	137
8	206
9	294
10	405
11	540
12	703
13	895
14	1120
15	1379
16	1676
17	2012
18	2391
19	2814
20	3285
21	3805
22	4378
23	5005
24	5690
25	6434
26	7241
27	8112
28	9051
29	10059
30	11140
31	12295
32	13528
33	14840
34	16235
35	17714
36	19281
37	20937
38	22686
39	24529
40	26470
41	28510
42	30653
43	32900

[0, 0, 3, 10, 25, 49, 86, 137, 206, 294, 405, 540, 703, 895, 1120, 1379, 1676, 2012, 2391, 2814, 3285, 3805, 4378, 5005, 5690, 6434, 7241, 8112, 9051, 10059, 11140, 12295, 13528, 14840, 16235, 17714, 19281, 20937, 22686, 24529, 26470, 28510, 30653, 32900]

cp's OEIS Frontend

A212068 Number of (w,x,y,z) with all terms in {1,...,n} and 2w=x+y+z.

Table of values

List of values